Finding the Fourth Proportional to 113,139.72, 156,088.18 and 72,876.81

Step by Step Solution

1. Step 1: Write the proportion equation
   113,139.72 : 156,088.18 = 72,876.81 : x
2. Step 2: Convert to fraction form
   113,139.72/156,088.18 = 72,876.81/x
3. Step 3: Cross multiply
   113,139.72x = 156,088.18 × 72,876.81
4. Step 4: Simplify right side
   113,139.72x = 11,375,209,313.53
5. Step 5: Solve for x
   x = 11,375,209,313.53/113,139.72
6. Step 6: Final answer
   x = 100,541.25