Finding the Fourth Proportional to 1,439.10, 1,986.06 and 1,124.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.10 : 1,986.06 = 1,124.76 : x
2. Step 2: Convert to fraction form
   1,439.10/1,986.06 = 1,124.76/x
3. Step 3: Cross multiply
   1,439.10x = 1,986.06 × 1,124.76
4. Step 4: Simplify right side
   1,439.10x = 2,233,840.85
5. Step 5: Solve for x
   x = 2,233,840.85/1,439.10
6. Step 6: Final answer
   x = 1,552.25