Finding the Fourth Proportional to 2,123.65, 3,185.31 and 662.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.65 : 3,185.31 = 662.75 : x
2. Step 2: Convert to fraction form
   2,123.65/3,185.31 = 662.75/x
3. Step 3: Cross multiply
   2,123.65x = 3,185.31 × 662.75
4. Step 4: Simplify right side
   2,123.65x = 2,111,064.20
5. Step 5: Solve for x
   x = 2,111,064.20/2,123.65
6. Step 6: Final answer
   x = 994.08