Finding the Fourth Proportional to 1,274.43, 1,906.81 and 754.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.43 : 1,906.81 = 754.71 : x
2. Step 2: Convert to fraction form
   1,274.43/1,906.81 = 754.71/x
3. Step 3: Cross multiply
   1,274.43x = 1,906.81 × 754.71
4. Step 4: Simplify right side
   1,274.43x = 1,439,077.15
5. Step 5: Solve for x
   x = 1,439,077.15/1,274.43
6. Step 6: Final answer
   x = 1,129.20