Finding the Fourth Proportional to 1,276.04, 1,760.34 and 803.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276.04 : 1,760.34 = 803.72 : x
2. Step 2: Convert to fraction form
   1,276.04/1,760.34 = 803.72/x
3. Step 3: Cross multiply
   1,276.04x = 1,760.34 × 803.72
4. Step 4: Simplify right side
   1,276.04x = 1,414,820.46
5. Step 5: Solve for x
   x = 1,414,820.46/1,276.04
6. Step 6: Final answer
   x = 1,108.76