Finding the Fourth Proportional to 2,082.93, 3,123.46 and 621.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.93 : 3,123.46 = 621.80 : x
2. Step 2: Convert to fraction form
   2,082.93/3,123.46 = 621.80/x
3. Step 3: Cross multiply
   2,082.93x = 3,123.46 × 621.80
4. Step 4: Simplify right side
   2,082.93x = 1,942,167.43
5. Step 5: Solve for x
   x = 1,942,167.43/2,082.93
6. Step 6: Final answer
   x = 932.42