Finding the Fourth Proportional to 2,725.20, 4,086.96 and 875.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,725.20 : 4,086.96 = 875.82 : x
2. Step 2: Convert to fraction form
   2,725.20/4,086.96 = 875.82/x
3. Step 3: Cross multiply
   2,725.20x = 4,086.96 × 875.82
4. Step 4: Simplify right side
   2,725.20x = 3,579,417.59
5. Step 5: Solve for x
   x = 3,579,417.59/2,725.20
6. Step 6: Final answer
   x = 1,313.45