Finding the Fourth Proportional to 9,143.22, 12,616.10 and 5,557.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,143.22 : 12,616.10 = 5,557.56 : x
2. Step 2: Convert to fraction form
   9,143.22/12,616.10 = 5,557.56/x
3. Step 3: Cross multiply
   9,143.22x = 12,616.10 × 5,557.56
4. Step 4: Simplify right side
   9,143.22x = 70,114,746.61
5. Step 5: Solve for x
   x = 70,114,746.61/9,143.22
6. Step 6: Final answer
   x = 7,668.50