Finding the Fourth Proportional to 9,128.55, 12,597.49 and 5,353.95

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.55 : 12,597.49 = 5,353.95 : x
2. Step 2: Convert to fraction form
   9,128.55/12,597.49 = 5,353.95/x
3. Step 3: Cross multiply
   9,128.55x = 12,597.49 × 5,353.95
4. Step 4: Simplify right side
   9,128.55x = 67,446,291.04
5. Step 5: Solve for x
   x = 67,446,291.04/9,128.55
6. Step 6: Final answer
   x = 7,388.50