Finding the Fourth Proportional to 8,317.30, 12,475.71 and 3,385.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,317.30 : 12,475.71 = 3,385.72 : x
2. Step 2: Convert to fraction form
   8,317.30/12,475.71 = 3,385.72/x
3. Step 3: Cross multiply
   8,317.30x = 12,475.71 × 3,385.72
4. Step 4: Simplify right side
   8,317.30x = 42,239,260.86
5. Step 5: Solve for x
   x = 42,239,260.86/8,317.30
6. Step 6: Final answer
   x = 5,078.48