Finding the Fourth Proportional to 12,002.88, 17,989.21 and 5,757.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,002.88 : 17,989.21 = 5,757.78 : x
2. Step 2: Convert to fraction form
   12,002.88/17,989.21 = 5,757.78/x
3. Step 3: Cross multiply
   12,002.88x = 17,989.21 × 5,757.78
4. Step 4: Simplify right side
   12,002.88x = 103,577,955.82
5. Step 5: Solve for x
   x = 103,577,955.82/12,002.88
6. Step 6: Final answer
   x = 8,629.42