Finding the Fourth Proportional to 91,685.72, 137,500.59 and 63,404.47

Step by Step Solution

1. Step 1: Write the proportion equation
   91,685.72 : 137,500.59 = 63,404.47 : x
2. Step 2: Convert to fraction form
   91,685.72/137,500.59 = 63,404.47/x
3. Step 3: Cross multiply
   91,685.72x = 137,500.59 × 63,404.47
4. Step 4: Simplify right side
   91,685.72x = 8,718,152,086.63
5. Step 5: Solve for x
   x = 8,718,152,086.63/91,685.72
6. Step 6: Final answer
   x = 95,087.35