Finding the Fourth Proportional to 91,661.24, 126,403.81 and 71,510.78

Step by Step Solution

1. Step 1: Write the proportion equation
   91,661.24 : 126,403.81 = 71,510.78 : x
2. Step 2: Convert to fraction form
   91,661.24/126,403.81 = 71,510.78/x
3. Step 3: Cross multiply
   91,661.24x = 126,403.81 × 71,510.78
4. Step 4: Simplify right side
   91,661.24x = 9,039,235,185.30
5. Step 5: Solve for x
   x = 9,039,235,185.30/91,661.24
6. Step 6: Final answer
   x = 98,615.67