Finding the Fourth Proportional to 2,123.98, 3,186.13 and 663.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.98 : 3,186.13 = 663.24 : x
2. Step 2: Convert to fraction form
   2,123.98/3,186.13 = 663.24/x
3. Step 3: Cross multiply
   2,123.98x = 3,186.13 × 663.24
4. Step 4: Simplify right side
   2,123.98x = 2,113,168.86
5. Step 5: Solve for x
   x = 2,113,168.86/2,123.98
6. Step 6: Final answer
   x = 994.91