Finding the Fourth Proportional to 402,367.50, 603,625.59 and 132,510.78

Step by Step Solution

1. Step 1: Write the proportion equation
   402,367.50 : 603,625.59 = 132,510.78 : x
2. Step 2: Convert to fraction form
   402,367.50/603,625.59 = 132,510.78/x
3. Step 3: Cross multiply
   402,367.50x = 603,625.59 × 132,510.78
4. Step 4: Simplify right side
   402,367.50x = 79,986,897,758.86
5. Step 5: Solve for x
   x = 79,986,897,758.86/402,367.50
6. Step 6: Final answer
   x = 198,790.65