Finding the Fourth Proportional to 1,648.94, 2,274.71 and 985.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.94 : 2,274.71 = 985.61 : x
2. Step 2: Convert to fraction form
   1,648.94/2,274.71 = 985.61/x
3. Step 3: Cross multiply
   1,648.94x = 2,274.71 × 985.61
4. Step 4: Simplify right side
   1,648.94x = 2,241,977.68
5. Step 5: Solve for x
   x = 2,241,977.68/1,648.94
6. Step 6: Final answer
   x = 1,359.65