Finding the Fourth Proportional to 9,375.89, 12,938.73 and 5,397.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,375.89 : 12,938.73 = 5,397.78 : x
2. Step 2: Convert to fraction form
   9,375.89/12,938.73 = 5,397.78/x
3. Step 3: Cross multiply
   9,375.89x = 12,938.73 × 5,397.78
4. Step 4: Simplify right side
   9,375.89x = 69,840,418.02
5. Step 5: Solve for x
   x = 69,840,418.02/9,375.89
6. Step 6: Final answer
   x = 7,448.94