Finding the Fourth Proportional to 5,411.50, 7,470.30 and 3,998.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,411.50 : 7,470.30 = 3,998.05 : x
2. Step 2: Convert to fraction form
   5,411.50/7,470.30 = 3,998.05/x
3. Step 3: Cross multiply
   5,411.50x = 7,470.30 × 3,998.05
4. Step 4: Simplify right side
   5,411.50x = 29,866,632.92
5. Step 5: Solve for x
   x = 29,866,632.92/5,411.50
6. Step 6: Final answer
   x = 5,519.10