Finding the Fourth Proportional to 1,275.50, 1,760.06 and 715.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,275.50 : 1,760.06 = 715.94 : x
2. Step 2: Convert to fraction form
   1,275.50/1,760.06 = 715.94/x
3. Step 3: Cross multiply
   1,275.50x = 1,760.06 × 715.94
4. Step 4: Simplify right side
   1,275.50x = 1,260,097.36
5. Step 5: Solve for x
   x = 1,260,097.36/1,275.50
6. Step 6: Final answer
   x = 987.92