Finding the Fourth Proportional to 9,375.93, 12,939.71 and 5,397.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,375.93 : 12,939.71 = 5,397.21 : x
2. Step 2: Convert to fraction form
   9,375.93/12,939.71 = 5,397.21/x
3. Step 3: Cross multiply
   9,375.93x = 12,939.71 × 5,397.21
4. Step 4: Simplify right side
   9,375.93x = 69,838,305.22
5. Step 5: Solve for x
   x = 69,838,305.22/9,375.93
6. Step 6: Final answer
   x = 7,448.68