Finding the Fourth Proportional to 113,111.31, 155,988.62 and 72,753.87

Step by Step Solution

1. Step 1: Write the proportion equation
   113,111.31 : 155,988.62 = 72,753.87 : x
2. Step 2: Convert to fraction form
   113,111.31/155,988.62 = 72,753.87/x
3. Step 3: Cross multiply
   113,111.31x = 155,988.62 × 72,753.87
4. Step 4: Simplify right side
   113,111.31x = 11,348,775,780.96
5. Step 5: Solve for x
   x = 11,348,775,780.96/113,111.31
6. Step 6: Final answer
   x = 100,332.81