Finding the Fourth Proportional to 1,648.56, 2,274.92 and 940.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.56 : 2,274.92 = 940.30 : x
2. Step 2: Convert to fraction form
   1,648.56/2,274.92 = 940.30/x
3. Step 3: Cross multiply
   1,648.56x = 2,274.92 × 940.30
4. Step 4: Simplify right side
   1,648.56x = 2,139,103.94
5. Step 5: Solve for x
   x = 2,139,103.94/1,648.56
6. Step 6: Final answer
   x = 1,297.56