Finding the Fourth Proportional to 9,143.71, 12,609.37 and 5,559.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,143.71 : 12,609.37 = 5,559.16 : x
2. Step 2: Convert to fraction form
   9,143.71/12,609.37 = 5,559.16/x
3. Step 3: Cross multiply
   9,143.71x = 12,609.37 × 5,559.16
4. Step 4: Simplify right side
   9,143.71x = 70,097,505.33
5. Step 5: Solve for x
   x = 70,097,505.33/9,143.71
6. Step 6: Final answer
   x = 7,666.20