Finding the Fourth Proportional to 91,793.52, 137,703.15 and 28,618.38

Step by Step Solution

1. Step 1: Write the proportion equation
   91,793.52 : 137,703.15 = 28,618.38 : x
2. Step 2: Convert to fraction form
   91,793.52/137,703.15 = 28,618.38/x
3. Step 3: Cross multiply
   91,793.52x = 137,703.15 × 28,618.38
4. Step 4: Simplify right side
   91,793.52x = 3,940,841,073.90
5. Step 5: Solve for x
   x = 3,940,841,073.90/91,793.52
6. Step 6: Final answer
   x = 42,931.58