Answer:
Number would be 2870000
Step by Step Explanation : 
Given : 2874992
To find : rounded to the nearest ten thousand 
Solution : We have given We can write it as 2874992
 Step 1 : Identify the ten thousand digit 7 in 2874992
 Step 2: Identify the next smallest place value 4 in 2874992
 Step 3: We can the digit less than five , so it would be rounded down. 
 Step 4 : The ten thousand digit 7 remain same and Every digit 
 after becomes a zero. 
Step 5 : Number become 2870000
Therefore, Number would be 2870000