Finding the Fourth Proportional to 2,123.68, 3,185.72 and 662.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.68 : 3,185.72 = 662.48 : x
2. Step 2: Convert to fraction form
   2,123.68/3,185.72 = 662.48/x
3. Step 3: Cross multiply
   2,123.68x = 3,185.72 × 662.48
4. Step 4: Simplify right side
   2,123.68x = 2,110,475.79
5. Step 5: Solve for x
   x = 2,110,475.79/2,123.68
6. Step 6: Final answer
   x = 993.78