Finding the Fourth Proportional to 1,648.84, 2,275.22 and 940.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.84 : 2,275.22 = 940.63 : x
2. Step 2: Convert to fraction form
   1,648.84/2,275.22 = 940.63/x
3. Step 3: Cross multiply
   1,648.84x = 2,275.22 × 940.63
4. Step 4: Simplify right side
   1,648.84x = 2,140,128.81
5. Step 5: Solve for x
   x = 2,140,128.81/1,648.84
6. Step 6: Final answer
   x = 1,297.96