Finding the Fourth Proportional to 5,414.40, 8,118.72 and 1,715.04

Step by Step Solution

1. Step 1: Write the proportion equation
   5,414.40 : 8,118.72 = 1,715.04 : x
2. Step 2: Convert to fraction form
   5,414.40/8,118.72 = 1,715.04/x
3. Step 3: Cross multiply
   5,414.40x = 8,118.72 × 1,715.04
4. Step 4: Simplify right side
   5,414.40x = 13,923,929.55
5. Step 5: Solve for x
   x = 13,923,929.55/5,414.40
6. Step 6: Final answer
   x = 2,571.65