Finding the Fourth Proportional to 9,167.28, 12,648.96 and 5,188.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,167.28 : 12,648.96 = 5,188.56 : x
2. Step 2: Convert to fraction form
   9,167.28/12,648.96 = 5,188.56/x
3. Step 3: Cross multiply
   9,167.28x = 12,648.96 × 5,188.56
4. Step 4: Simplify right side
   9,167.28x = 65,629,887.90
5. Step 5: Solve for x
   x = 65,629,887.90/9,167.28
6. Step 6: Final answer
   x = 7,159.15