Finding the Fourth Proportional to 1,238.06, 1,708.76 and 714.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.06 : 1,708.76 = 714.12 : x
2. Step 2: Convert to fraction form
   1,238.06/1,708.76 = 714.12/x
3. Step 3: Cross multiply
   1,238.06x = 1,708.76 × 714.12
4. Step 4: Simplify right side
   1,238.06x = 1,220,259.69
5. Step 5: Solve for x
   x = 1,220,259.69/1,238.06
6. Step 6: Final answer
   x = 985.62