Finding the Fourth Proportional to 2,520.59, 3,781.50 and 877.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.59 : 3,781.50 = 877.15 : x
2. Step 2: Convert to fraction form
   2,520.59/3,781.50 = 877.15/x
3. Step 3: Cross multiply
   2,520.59x = 3,781.50 × 877.15
4. Step 4: Simplify right side
   2,520.59x = 3,316,942.73
5. Step 5: Solve for x
   x = 3,316,942.73/2,520.59
6. Step 6: Final answer
   x = 1,315.94