Finding the Fourth Proportional to 2,123.84, 3,185.68 and 662.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.84 : 3,185.68 = 662.96 : x
2. Step 2: Convert to fraction form
   2,123.84/3,185.68 = 662.96/x
3. Step 3: Cross multiply
   2,123.84x = 3,185.68 × 662.96
4. Step 4: Simplify right side
   2,123.84x = 2,111,978.41
5. Step 5: Solve for x
   x = 2,111,978.41/2,123.84
6. Step 6: Final answer
   x = 994.42