Finding the Fourth Proportional to 5,287.71, 7,925.83 and 3,440.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,287.71 : 7,925.83 = 3,440.15 : x
2. Step 2: Convert to fraction form
   5,287.71/7,925.83 = 3,440.15/x
3. Step 3: Cross multiply
   5,287.71x = 7,925.83 × 3,440.15
4. Step 4: Simplify right side
   5,287.71x = 27,266,044.07
5. Step 5: Solve for x
   x = 27,266,044.07/5,287.71
6. Step 6: Final answer
   x = 5,156.49