Finding the Fourth Proportional to 6,238.31, 8,612.18 and 4,115.30

Step by Step Solution

1. Step 1: Write the proportion equation
   6,238.31 : 8,612.18 = 4,115.30 : x
2. Step 2: Convert to fraction form
   6,238.31/8,612.18 = 4,115.30/x
3. Step 3: Cross multiply
   6,238.31x = 8,612.18 × 4,115.30
4. Step 4: Simplify right side
   6,238.31x = 35,441,640.72
5. Step 5: Solve for x
   x = 35,441,640.72/6,238.31
6. Step 6: Final answer
   x = 5,681.29