Finding the Fourth Proportional to 1,238.28, 1,708.83 and 714.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.28 : 1,708.83 = 714.62 : x
2. Step 2: Convert to fraction form
   1,238.28/1,708.83 = 714.62/x
3. Step 3: Cross multiply
   1,238.28x = 1,708.83 × 714.62
4. Step 4: Simplify right side
   1,238.28x = 1,221,155.55
5. Step 5: Solve for x
   x = 1,221,155.55/1,238.28
6. Step 6: Final answer
   x = 986.17