Finding the Fourth Proportional to 1,648.31, 2,274.74 and 940.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.31 : 2,274.74 = 940.23 : x
2. Step 2: Convert to fraction form
   1,648.31/2,274.74 = 940.23/x
3. Step 3: Cross multiply
   1,648.31x = 2,274.74 × 940.23
4. Step 4: Simplify right side
   1,648.31x = 2,138,778.79
5. Step 5: Solve for x
   x = 2,138,778.79/1,648.31
6. Step 6: Final answer
   x = 1,297.56