Finding the Fourth Proportional to 9,374.39, 12,939.54 and 5,398.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,374.39 : 12,939.54 = 5,398.16 : x
2. Step 2: Convert to fraction form
   9,374.39/12,939.54 = 5,398.16/x
3. Step 3: Cross multiply
   9,374.39x = 12,939.54 × 5,398.16
4. Step 4: Simplify right side
   9,374.39x = 69,849,642.55
5. Step 5: Solve for x
   x = 69,849,642.55/9,374.39
6. Step 6: Final answer
   x = 7,451.12