Finding the Fourth Proportional to 2,520.32, 3,781.11 and 876.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.32 : 3,781.11 = 876.89 : x
2. Step 2: Convert to fraction form
   2,520.32/3,781.11 = 876.89/x
3. Step 3: Cross multiply
   2,520.32x = 3,781.11 × 876.89
4. Step 4: Simplify right side
   2,520.32x = 3,315,598.64
5. Step 5: Solve for x
   x = 3,315,598.64/2,520.32
6. Step 6: Final answer
   x = 1,315.55