Finding the Fourth Proportional to 87,196.71, 130,617.54 and 79,931.01

Step by Step Solution

1. Step 1: Write the proportion equation
   87,196.71 : 130,617.54 = 79,931.01 : x
2. Step 2: Convert to fraction form
   87,196.71/130,617.54 = 79,931.01/x
3. Step 3: Cross multiply
   87,196.71x = 130,617.54 × 79,931.01
4. Step 4: Simplify right side
   87,196.71x = 10,440,391,895.92
5. Step 5: Solve for x
   x = 10,440,391,895.92/87,196.71
6. Step 6: Final answer
   x = 119,733.78