Finding the Fourth Proportional to 9,375.40, 12,938.34 and 5,397.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,375.40 : 12,938.34 = 5,397.31 : x
2. Step 2: Convert to fraction form
   9,375.40/12,938.34 = 5,397.31/x
3. Step 3: Cross multiply
   9,375.40x = 12,938.34 × 5,397.31
4. Step 4: Simplify right side
   9,375.40x = 69,832,231.87
5. Step 5: Solve for x
   x = 69,832,231.87/9,375.40
6. Step 6: Final answer
   x = 7,448.45