Finding the Fourth Proportional to 8,147.61, 12,224.88 and 5,518.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,147.61 : 12,224.88 = 5,518.08 : x
2. Step 2: Convert to fraction form
   8,147.61/12,224.88 = 5,518.08/x
3. Step 3: Cross multiply
   8,147.61x = 12,224.88 × 5,518.08
4. Step 4: Simplify right side
   8,147.61x = 67,457,865.83
5. Step 5: Solve for x
   x = 67,457,865.83/8,147.61
6. Step 6: Final answer
   x = 8,279.47