Finding the Fourth Proportional to 9,375.20, 12,938.56 and 5,397.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,375.20 : 12,938.56 = 5,397.60 : x
2. Step 2: Convert to fraction form
   9,375.20/12,938.56 = 5,397.60/x
3. Step 3: Cross multiply
   9,375.20x = 12,938.56 × 5,397.60
4. Step 4: Simplify right side
   9,375.20x = 69,837,171.46
5. Step 5: Solve for x
   x = 69,837,171.46/9,375.20
6. Step 6: Final answer
   x = 7,449.14