Finding the Fourth Proportional to 1,449.78, 1,998.77 and 1,200.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,449.78 : 1,998.77 = 1,200.18 : x
2. Step 2: Convert to fraction form
   1,449.78/1,998.77 = 1,200.18/x
3. Step 3: Cross multiply
   1,449.78x = 1,998.77 × 1,200.18
4. Step 4: Simplify right side
   1,449.78x = 2,398,883.78
5. Step 5: Solve for x
   x = 2,398,883.78/1,449.78
6. Step 6: Final answer
   x = 1,654.65