Finding the Fourth Proportional to 1,627.20, 2,245.86 and 963.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.20 : 2,245.86 = 963.72 : x
2. Step 2: Convert to fraction form
   1,627.20/2,245.86 = 963.72/x
3. Step 3: Cross multiply
   1,627.20x = 2,245.86 × 963.72
4. Step 4: Simplify right side
   1,627.20x = 2,164,380.20
5. Step 5: Solve for x
   x = 2,164,380.20/1,627.20
6. Step 6: Final answer
   x = 1,330.13