Finding the Fourth Proportional to 1,404.37, 2,105.40 and 663.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.37 : 2,105.40 = 663.62 : x
2. Step 2: Convert to fraction form
   1,404.37/2,105.40 = 663.62/x
3. Step 3: Cross multiply
   1,404.37x = 2,105.40 × 663.62
4. Step 4: Simplify right side
   1,404.37x = 1,397,185.55
5. Step 5: Solve for x
   x = 1,397,185.55/1,404.37
6. Step 6: Final answer
   x = 994.88