Finding the Fourth Proportional to 8,807.19, 12,144.16 and 5,615.43

Step by Step Solution

1. Step 1: Write the proportion equation
   8,807.19 : 12,144.16 = 5,615.43 : x
2. Step 2: Convert to fraction form
   8,807.19/12,144.16 = 5,615.43/x
3. Step 3: Cross multiply
   8,807.19x = 12,144.16 × 5,615.43
4. Step 4: Simplify right side
   8,807.19x = 68,194,591.59
5. Step 5: Solve for x
   x = 68,194,591.59/8,807.19
6. Step 6: Final answer
   x = 7,743.06