Finding the Fourth Proportional to 1,439.97, 2,158.33 and 710.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.97 : 2,158.33 = 710.05 : x
2. Step 2: Convert to fraction form
   1,439.97/2,158.33 = 710.05/x
3. Step 3: Cross multiply
   1,439.97x = 2,158.33 × 710.05
4. Step 4: Simplify right side
   1,439.97x = 1,532,522.22
5. Step 5: Solve for x
   x = 1,532,522.22/1,439.97
6. Step 6: Final answer
   x = 1,064.27