Finding the Fourth Proportional to 125,021, 172,513.74 and 99,592.10

Step by Step Solution

1. Step 1: Write the proportion equation
   125,021 : 172,513.74 = 99,592.10 : x
2. Step 2: Convert to fraction form
   125,021/172,513.74 = 99,592.10/x
3. Step 3: Cross multiply
   125,021x = 172,513.74 × 99,592.10
4. Step 4: Simplify right side
   125,021x = 17,181,005,645.45
5. Step 5: Solve for x
   x = 17,181,005,645.45/125,021
6. Step 6: Final answer
   x = 137,424.96