Finding the Fourth Proportional to 9,126.16, 12,591.72 and 5,398.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,126.16 : 12,591.72 = 5,398.48 : x
2. Step 2: Convert to fraction form
   9,126.16/12,591.72 = 5,398.48/x
3. Step 3: Cross multiply
   9,126.16x = 12,591.72 × 5,398.48
4. Step 4: Simplify right side
   9,126.16x = 67,976,148.59
5. Step 5: Solve for x
   x = 67,976,148.59/9,126.16
6. Step 6: Final answer
   x = 7,448.49