Finding the Fourth Proportional to 1,174.72, 1,761.28 and 850.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,174.72 : 1,761.28 = 850.72 : x
2. Step 2: Convert to fraction form
   1,174.72/1,761.28 = 850.72/x
3. Step 3: Cross multiply
   1,174.72x = 1,761.28 × 850.72
4. Step 4: Simplify right side
   1,174.72x = 1,498,356.12
5. Step 5: Solve for x
   x = 1,498,356.12/1,174.72
6. Step 6: Final answer
   x = 1,275.50