Finding the Fourth Proportional to 2,520.45, 3,781.76 and 876.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.45 : 3,781.76 = 876.10 : x
2. Step 2: Convert to fraction form
   2,520.45/3,781.76 = 876.10/x
3. Step 3: Cross multiply
   2,520.45x = 3,781.76 × 876.10
4. Step 4: Simplify right side
   2,520.45x = 3,313,186.10
5. Step 5: Solve for x
   x = 3,313,186.10/2,520.45
6. Step 6: Final answer
   x = 1,314.52