Finding the Fourth Proportional to 113,123.36, 156,146.82 and 81,384.50

Step by Step Solution

1. Step 1: Write the proportion equation
   113,123.36 : 156,146.82 = 81,384.50 : x
2. Step 2: Convert to fraction form
   113,123.36/156,146.82 = 81,384.50/x
3. Step 3: Cross multiply
   113,123.36x = 156,146.82 × 81,384.50
4. Step 4: Simplify right side
   113,123.36x = 12,707,930,872.29
5. Step 5: Solve for x
   x = 12,707,930,872.29/113,123.36
6. Step 6: Final answer
   x = 112,336.93