Finding the Fourth Proportional to 5,287.18, 7,925.04 and 3,439.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,287.18 : 7,925.04 = 3,439.61 : x
2. Step 2: Convert to fraction form
   5,287.18/7,925.04 = 3,439.61/x
3. Step 3: Cross multiply
   5,287.18x = 7,925.04 × 3,439.61
4. Step 4: Simplify right side
   5,287.18x = 27,259,046.83
5. Step 5: Solve for x
   x = 27,259,046.83/5,287.18
6. Step 6: Final answer
   x = 5,155.69