Finding the Fourth Proportional to 1,648.30, 2,274.56 and 940.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.30 : 2,274.56 = 940.05 : x
2. Step 2: Convert to fraction form
   1,648.30/2,274.56 = 940.05/x
3. Step 3: Cross multiply
   1,648.30x = 2,274.56 × 940.05
4. Step 4: Simplify right side
   1,648.30x = 2,138,184.05
5. Step 5: Solve for x
   x = 2,138,184.05/1,648.30
6. Step 6: Final answer
   x = 1,297.21