Finding the Fourth Proportional to 2,520.72, 3,781.62 and 877.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.72 : 3,781.62 = 877.14 : x
2. Step 2: Convert to fraction form
   2,520.72/3,781.62 = 877.14/x
3. Step 3: Cross multiply
   2,520.72x = 3,781.62 × 877.14
4. Step 4: Simplify right side
   2,520.72x = 3,317,010.17
5. Step 5: Solve for x
   x = 3,317,010.17/2,520.72
6. Step 6: Final answer
   x = 1,315.90