Finding the Fourth Proportional to 2,123.61, 3,185.97 and 662.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.61 : 3,185.97 = 662.70 : x
2. Step 2: Convert to fraction form
   2,123.61/3,185.97 = 662.70/x
3. Step 3: Cross multiply
   2,123.61x = 3,185.97 × 662.70
4. Step 4: Simplify right side
   2,123.61x = 2,111,342.32
5. Step 5: Solve for x
   x = 2,111,342.32/2,123.61
6. Step 6: Final answer
   x = 994.22