Finding the Fourth Proportional to 1,648.32, 2,274.56 and 985.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.32 : 2,274.56 = 985.17 : x
2. Step 2: Convert to fraction form
   1,648.32/2,274.56 = 985.17/x
3. Step 3: Cross multiply
   1,648.32x = 2,274.56 × 985.17
4. Step 4: Simplify right side
   1,648.32x = 2,240,835.57
5. Step 5: Solve for x
   x = 2,240,835.57/1,648.32
6. Step 6: Final answer
   x = 1,359.47