Finding the Fourth Proportional to 1,274.82, 1,759.33 and 715.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.82 : 1,759.33 = 715.48 : x
2. Step 2: Convert to fraction form
   1,274.82/1,759.33 = 715.48/x
3. Step 3: Cross multiply
   1,274.82x = 1,759.33 × 715.48
4. Step 4: Simplify right side
   1,274.82x = 1,258,765.43
5. Step 5: Solve for x
   x = 1,258,765.43/1,274.82
6. Step 6: Final answer
   x = 987.41