Finding the Fourth Proportional to 2,123.62, 3,185.31 and 662.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.62 : 3,185.31 = 662.66 : x
2. Step 2: Convert to fraction form
   2,123.62/3,185.31 = 662.66/x
3. Step 3: Cross multiply
   2,123.62x = 3,185.31 × 662.66
4. Step 4: Simplify right side
   2,123.62x = 2,110,777.52
5. Step 5: Solve for x
   x = 2,110,777.52/2,123.62
6. Step 6: Final answer
   x = 993.95