Finding the Fourth Proportional to 1,274.35, 1,758.54 and 714.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.35 : 1,758.54 = 714.82 : x
2. Step 2: Convert to fraction form
   1,274.35/1,758.54 = 714.82/x
3. Step 3: Cross multiply
   1,274.35x = 1,758.54 × 714.82
4. Step 4: Simplify right side
   1,274.35x = 1,257,039.56
5. Step 5: Solve for x
   x = 1,257,039.56/1,274.35
6. Step 6: Final answer
   x = 986.42