Finding the Fourth Proportional to 1,322.56, 1,982.16 and 627.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.56 : 1,982.16 = 627.72 : x
2. Step 2: Convert to fraction form
   1,322.56/1,982.16 = 627.72/x
3. Step 3: Cross multiply
   1,322.56x = 1,982.16 × 627.72
4. Step 4: Simplify right side
   1,322.56x = 1,244,241.48
5. Step 5: Solve for x
   x = 1,244,241.48/1,322.56
6. Step 6: Final answer
   x = 940.78