Finding the Fourth Proportional to 1,078.58, 1,614.98 and 708.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.58 : 1,614.98 = 708.86 : x
2. Step 2: Convert to fraction form
   1,078.58/1,614.98 = 708.86/x
3. Step 3: Cross multiply
   1,078.58x = 1,614.98 × 708.86
4. Step 4: Simplify right side
   1,078.58x = 1,144,794.72
5. Step 5: Solve for x
   x = 1,144,794.72/1,078.58
6. Step 6: Final answer
   x = 1,061.39