Finding the Fourth Proportional to 92,935.86, 128,240.54 and 54,687

Step by Step Solution

1. Step 1: Write the proportion equation
   92,935.86 : 128,240.54 = 54,687 : x
2. Step 2: Convert to fraction form
   92,935.86/128,240.54 = 54,687/x
3. Step 3: Cross multiply
   92,935.86x = 128,240.54 × 54,687
4. Step 4: Simplify right side
   92,935.86x = 7,013,090,410.98
5. Step 5: Solve for x
   x = 7,013,090,410.98/92,935.86
6. Step 6: Final answer
   x = 75,461.62