Finding the Fourth Proportional to 1,671.57, 2,306.72 and 963.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,671.57 : 2,306.72 = 963.40 : x
2. Step 2: Convert to fraction form
   1,671.57/2,306.72 = 963.40/x
3. Step 3: Cross multiply
   1,671.57x = 2,306.72 × 963.40
4. Step 4: Simplify right side
   1,671.57x = 2,222,282.51
5. Step 5: Solve for x
   x = 2,222,282.51/1,671.57
6. Step 6: Final answer
   x = 1,329.46