Finding the Fourth Proportional to 1,245.48, 1,718.82 and 714.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,245.48 : 1,718.82 = 714.45 : x
2. Step 2: Convert to fraction form
   1,245.48/1,718.82 = 714.45/x
3. Step 3: Cross multiply
   1,245.48x = 1,718.82 × 714.45
4. Step 4: Simplify right side
   1,245.48x = 1,228,002.89
5. Step 5: Solve for x
   x = 1,228,002.89/1,245.48
6. Step 6: Final answer
   x = 985.97