Finding the Fourth Proportional to 1,238.18, 1,708.89 and 714.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.18 : 1,708.89 = 714.38 : x
2. Step 2: Convert to fraction form
   1,238.18/1,708.89 = 714.38/x
3. Step 3: Cross multiply
   1,238.18x = 1,708.89 × 714.38
4. Step 4: Simplify right side
   1,238.18x = 1,220,796.84
5. Step 5: Solve for x
   x = 1,220,796.84/1,238.18
6. Step 6: Final answer
   x = 985.96