Finding the Fourth Proportional to 9,131.08, 12,603.30 and 5,354.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.08 : 12,603.30 = 5,354.80 : x
2. Step 2: Convert to fraction form
   9,131.08/12,603.30 = 5,354.80/x
3. Step 3: Cross multiply
   9,131.08x = 12,603.30 × 5,354.80
4. Step 4: Simplify right side
   9,131.08x = 67,488,150.84
5. Step 5: Solve for x
   x = 67,488,150.84/9,131.08
6. Step 6: Final answer
   x = 7,391.04