Finding the Fourth Proportional to 91,513.12, 137,046.12 and 56,404.48

Step by Step Solution

1. Step 1: Write the proportion equation
   91,513.12 : 137,046.12 = 56,404.48 : x
2. Step 2: Convert to fraction form
   91,513.12/137,046.12 = 56,404.48/x
3. Step 3: Cross multiply
   91,513.12x = 137,046.12 × 56,404.48
4. Step 4: Simplify right side
   91,513.12x = 7,730,015,134.62
5. Step 5: Solve for x
   x = 7,730,015,134.62/91,513.12
6. Step 6: Final answer
   x = 84,468.93