Finding the Fourth Proportional to 2,123.51, 3,185.12 and 662.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.51 : 3,185.12 = 662.63 : x
2. Step 2: Convert to fraction form
   2,123.51/3,185.12 = 662.63/x
3. Step 3: Cross multiply
   2,123.51x = 3,185.12 × 662.63
4. Step 4: Simplify right side
   2,123.51x = 2,110,541.80
5. Step 5: Solve for x
   x = 2,110,541.80/2,123.51
6. Step 6: Final answer
   x = 993.90