Finding the Fourth Proportional to 1,245.31, 1,718.52 and 714.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,245.31 : 1,718.52 = 714.29 : x
2. Step 2: Convert to fraction form
   1,245.31/1,718.52 = 714.29/x
3. Step 3: Cross multiply
   1,245.31x = 1,718.52 × 714.29
4. Step 4: Simplify right side
   1,245.31x = 1,227,510.38
5. Step 5: Solve for x
   x = 1,227,510.38/1,245.31
6. Step 6: Final answer
   x = 985.71