Finding the Fourth Proportional to 1,648.54, 2,274.04 and 985.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.54 : 2,274.04 = 985.15 : x
2. Step 2: Convert to fraction form
   1,648.54/2,274.04 = 985.15/x
3. Step 3: Cross multiply
   1,648.54x = 2,274.04 × 985.15
4. Step 4: Simplify right side
   1,648.54x = 2,240,270.51
5. Step 5: Solve for x
   x = 2,240,270.51/1,648.54
6. Step 6: Final answer
   x = 1,358.94