Finding the Fourth Proportional to 8,002.08, 12,006.72 and 5,079.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,002.08 : 12,006.72 = 5,079.60 : x
2. Step 2: Convert to fraction form
   8,002.08/12,006.72 = 5,079.60/x
3. Step 3: Cross multiply
   8,002.08x = 12,006.72 × 5,079.60
4. Step 4: Simplify right side
   8,002.08x = 60,989,334.91
5. Step 5: Solve for x
   x = 60,989,334.91/8,002.08
6. Step 6: Final answer
   x = 7,621.69