Finding the Fourth Proportional to 1,275.34, 1,760.02 and 715.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,275.34 : 1,760.02 = 715.82 : x
2. Step 2: Convert to fraction form
   1,275.34/1,760.02 = 715.82/x
3. Step 3: Cross multiply
   1,275.34x = 1,760.02 × 715.82
4. Step 4: Simplify right side
   1,275.34x = 1,259,857.52
5. Step 5: Solve for x
   x = 1,259,857.52/1,275.34
6. Step 6: Final answer
   x = 987.86