Finding the Fourth Proportional to 1,275.53, 1,760.42 and 716.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,275.53 : 1,760.42 = 716.22 : x
2. Step 2: Convert to fraction form
   1,275.53/1,760.42 = 716.22/x
3. Step 3: Cross multiply
   1,275.53x = 1,760.42 × 716.22
4. Step 4: Simplify right side
   1,275.53x = 1,260,844.43
5. Step 5: Solve for x
   x = 1,260,844.43/1,275.53
6. Step 6: Final answer
   x = 988.49