Finding the Fourth Proportional to 9,132.88, 12,603.54 and 5,355.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,132.88 : 12,603.54 = 5,355.16 : x
2. Step 2: Convert to fraction form
   9,132.88/12,603.54 = 5,355.16/x
3. Step 3: Cross multiply
   9,132.88x = 12,603.54 × 5,355.16
4. Step 4: Simplify right side
   9,132.88x = 67,493,973.27
5. Step 5: Solve for x
   x = 67,493,973.27/9,132.88
6. Step 6: Final answer
   x = 7,390.22