Finding the Fourth Proportional to 9,380.54, 12,945.20 and 5,401.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,380.54 : 12,945.20 = 5,401.62 : x
2. Step 2: Convert to fraction form
   9,380.54/12,945.20 = 5,401.62/x
3. Step 3: Cross multiply
   9,380.54x = 12,945.20 × 5,401.62
4. Step 4: Simplify right side
   9,380.54x = 69,925,024.22
5. Step 5: Solve for x
   x = 69,925,024.22/9,380.54
6. Step 6: Final answer
   x = 7,454.26