Finding the Fourth Proportional to 2,088.72, 3,132.90 and 628.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.72 : 3,132.90 = 628.20 : x
2. Step 2: Convert to fraction form
   2,088.72/3,132.90 = 628.20/x
3. Step 3: Cross multiply
   2,088.72x = 3,132.90 × 628.20
4. Step 4: Simplify right side
   2,088.72x = 1,968,087.78
5. Step 5: Solve for x
   x = 1,968,087.78/2,088.72
6. Step 6: Final answer
   x = 942.25