Finding the Fourth Proportional to 1,273.98, 1,758.17 and 714.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,273.98 : 1,758.17 = 714.43 : x
2. Step 2: Convert to fraction form
   1,273.98/1,758.17 = 714.43/x
3. Step 3: Cross multiply
   1,273.98x = 1,758.17 × 714.43
4. Step 4: Simplify right side
   1,273.98x = 1,256,089.39
5. Step 5: Solve for x
   x = 1,256,089.39/1,273.98
6. Step 6: Final answer
   x = 985.96