Finding the Fourth Proportional to 131,417.10, 181,355.47 and 70,987.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131,417.10 : 181,355.47 = 70,987.72 : x
2. Step 2: Convert to fraction form
   131,417.10/181,355.47 = 70,987.72/x
3. Step 3: Cross multiply
   131,417.10x = 181,355.47 × 70,987.72
4. Step 4: Simplify right side
   131,417.10x = 12,874,010,623.78
5. Step 5: Solve for x
   x = 12,874,010,623.78/131,417.10
6. Step 6: Final answer
   x = 97,962.98