Finding the Fourth Proportional to 9,350.64, 12,899.43 and 5,571.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,350.64 : 12,899.43 = 5,571.63 : x
2. Step 2: Convert to fraction form
   9,350.64/12,899.43 = 5,571.63/x
3. Step 3: Cross multiply
   9,350.64x = 12,899.43 × 5,571.63
4. Step 4: Simplify right side
   9,350.64x = 71,870,851.17
5. Step 5: Solve for x
   x = 71,870,851.17/9,350.64
6. Step 6: Final answer
   x = 7,686.20