Finding the Fourth Proportional to 5,401.45, 7,454.19 and 2,978.71

Step by Step Solution

1. Step 1: Write the proportion equation
   5,401.45 : 7,454.19 = 2,978.71 : x
2. Step 2: Convert to fraction form
   5,401.45/7,454.19 = 2,978.71/x
3. Step 3: Cross multiply
   5,401.45x = 7,454.19 × 2,978.71
4. Step 4: Simplify right side
   5,401.45x = 22,203,870.29
5. Step 5: Solve for x
   x = 22,203,870.29/5,401.45
6. Step 6: Final answer
   x = 4,110.72