Finding the Fourth Proportional to 2,725.47, 4,087.31 and 876.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,725.47 : 4,087.31 = 876.15 : x
2. Step 2: Convert to fraction form
   2,725.47/4,087.31 = 876.15/x
3. Step 3: Cross multiply
   2,725.47x = 4,087.31 × 876.15
4. Step 4: Simplify right side
   2,725.47x = 3,581,092.28
5. Step 5: Solve for x
   x = 3,581,092.28/2,725.47
6. Step 6: Final answer
   x = 1,313.94