Finding the Fourth Proportional to 9,380.67, 12,945.41 and 5,401.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,380.67 : 12,945.41 = 5,401.55 : x
2. Step 2: Convert to fraction form
   9,380.67/12,945.41 = 5,401.55/x
3. Step 3: Cross multiply
   9,380.67x = 12,945.41 × 5,401.55
4. Step 4: Simplify right side
   9,380.67x = 69,925,187.65
5. Step 5: Solve for x
   x = 69,925,187.65/9,380.67
6. Step 6: Final answer
   x = 7,454.18