Finding the Fourth Proportional to 8,259.86, 12,385.53 and 3,328.17

Step by Step Solution

1. Step 1: Write the proportion equation
   8,259.86 : 12,385.53 = 3,328.17 : x
2. Step 2: Convert to fraction form
   8,259.86/12,385.53 = 3,328.17/x
3. Step 3: Cross multiply
   8,259.86x = 12,385.53 × 3,328.17
4. Step 4: Simplify right side
   8,259.86x = 41,221,149.38
5. Step 5: Solve for x
   x = 41,221,149.38/8,259.86
6. Step 6: Final answer
   x = 4,990.54