Finding the Fourth Proportional to 1,648.34, 2,274.65 and 984.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.34 : 2,274.65 = 984.80 : x
2. Step 2: Convert to fraction form
   1,648.34/2,274.65 = 984.80/x
3. Step 3: Cross multiply
   1,648.34x = 2,274.65 × 984.80
4. Step 4: Simplify right side
   1,648.34x = 2,240,065.86
5. Step 5: Solve for x
   x = 2,240,065.86/1,648.34
6. Step 6: Final answer
   x = 1,358.99