Finding the Fourth Proportional to 1,440.98, 2,158.62 and 708.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.98 : 2,158.62 = 708.34 : x
2. Step 2: Convert to fraction form
   1,440.98/2,158.62 = 708.34/x
3. Step 3: Cross multiply
   1,440.98x = 2,158.62 × 708.34
4. Step 4: Simplify right side
   1,440.98x = 1,529,036.89
5. Step 5: Solve for x
   x = 1,529,036.89/1,440.98
6. Step 6: Final answer
   x = 1,061.11