Finding the Fourth Proportional to 1,550.43, 2,139.48 and 1,025.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.43 : 2,139.48 = 1,025.55 : x
2. Step 2: Convert to fraction form
   1,550.43/2,139.48 = 1,025.55/x
3. Step 3: Cross multiply
   1,550.43x = 2,139.48 × 1,025.55
4. Step 4: Simplify right side
   1,550.43x = 2,194,143.71
5. Step 5: Solve for x
   x = 2,194,143.71/1,550.43
6. Step 6: Final answer
   x = 1,415.18