Finding the Fourth Proportional to 1,273.89, 1,757.99 and 714.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,273.89 : 1,757.99 = 714.48 : x
2. Step 2: Convert to fraction form
   1,273.89/1,757.99 = 714.48/x
3. Step 3: Cross multiply
   1,273.89x = 1,757.99 × 714.48
4. Step 4: Simplify right side
   1,273.89x = 1,256,045.12
5. Step 5: Solve for x
   x = 1,256,045.12/1,273.89
6. Step 6: Final answer
   x = 985.99