Finding the Fourth Proportional to 8,320.18, 12,482.52 and 3,640.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,320.18 : 12,482.52 = 3,640.61 : x
2. Step 2: Convert to fraction form
   8,320.18/12,482.52 = 3,640.61/x
3. Step 3: Cross multiply
   8,320.18x = 12,482.52 × 3,640.61
4. Step 4: Simplify right side
   8,320.18x = 45,443,987.14
5. Step 5: Solve for x
   x = 45,443,987.14/8,320.18
6. Step 6: Final answer
   x = 5,461.90