Finding the Fourth Proportional to 1,274.83, 1,759.35 and 715.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.83 : 1,759.35 = 715.34 : x
2. Step 2: Convert to fraction form
   1,274.83/1,759.35 = 715.34/x
3. Step 3: Cross multiply
   1,274.83x = 1,759.35 × 715.34
4. Step 4: Simplify right side
   1,274.83x = 1,258,521.06
5. Step 5: Solve for x
   x = 1,258,521.06/1,274.83
6. Step 6: Final answer
   x = 987.21