Finding the Fourth Proportional to 1,082.75, 1,625.74 and 621.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.75 : 1,625.74 = 621.05 : x
2. Step 2: Convert to fraction form
   1,082.75/1,625.74 = 621.05/x
3. Step 3: Cross multiply
   1,082.75x = 1,625.74 × 621.05
4. Step 4: Simplify right side
   1,082.75x = 1,009,656.15
5. Step 5: Solve for x
   x = 1,009,656.15/1,082.75
6. Step 6: Final answer
   x = 932.50