Finding the Fourth Proportional to 9,379.89, 12,945.47 and 5,401.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.89 : 12,945.47 = 5,401.17 : x
2. Step 2: Convert to fraction form
   9,379.89/12,945.47 = 5,401.17/x
3. Step 3: Cross multiply
   9,379.89x = 12,945.47 × 5,401.17
4. Step 4: Simplify right side
   9,379.89x = 69,920,684.20
5. Step 5: Solve for x
   x = 69,920,684.20/9,379.89
6. Step 6: Final answer
   x = 7,454.32