Finding the Fourth Proportional to 91,731.89, 126,472.82 and 59,409.40

Step by Step Solution

1. Step 1: Write the proportion equation
   91,731.89 : 126,472.82 = 59,409.40 : x
2. Step 2: Convert to fraction form
   91,731.89/126,472.82 = 59,409.40/x
3. Step 3: Cross multiply
   91,731.89x = 126,472.82 × 59,409.40
4. Step 4: Simplify right side
   91,731.89x = 7,513,673,423.10
5. Step 5: Solve for x
   x = 7,513,673,423.10/91,731.89
6. Step 6: Final answer
   x = 81,909.07