Finding the Fourth Proportional to 1,282.05, 1,769.20 and 714.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,282.05 : 1,769.20 = 714.89 : x
2. Step 2: Convert to fraction form
   1,282.05/1,769.20 = 714.89/x
3. Step 3: Cross multiply
   1,282.05x = 1,769.20 × 714.89
4. Step 4: Simplify right side
   1,282.05x = 1,264,786.02
5. Step 5: Solve for x
   x = 1,264,786.02/1,282.05
6. Step 6: Final answer
   x = 986.53