Finding the Fourth Proportional to 1,274.34, 1,758.50 and 714.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.34 : 1,758.50 = 714.84 : x
2. Step 2: Convert to fraction form
   1,274.34/1,758.50 = 714.84/x
3. Step 3: Cross multiply
   1,274.34x = 1,758.50 × 714.84
4. Step 4: Simplify right side
   1,274.34x = 1,257,046.14
5. Step 5: Solve for x
   x = 1,257,046.14/1,274.34
6. Step 6: Final answer
   x = 986.43