Finding the Fourth Proportional to 1,118.46, 1,677.72 and 708.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.46 : 1,677.72 = 708.42 : x
2. Step 2: Convert to fraction form
   1,118.46/1,677.72 = 708.42/x
3. Step 3: Cross multiply
   1,118.46x = 1,677.72 × 708.42
4. Step 4: Simplify right side
   1,118.46x = 1,188,530.40
5. Step 5: Solve for x
   x = 1,188,530.40/1,118.46
6. Step 6: Final answer
   x = 1,062.65