Finding the Fourth Proportional to 1,243.95, 1,853.82 and 1,206.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.95 : 1,853.82 = 1,206.42 : x
2. Step 2: Convert to fraction form
   1,243.95/1,853.82 = 1,206.42/x
3. Step 3: Cross multiply
   1,243.95x = 1,853.82 × 1,206.42
4. Step 4: Simplify right side
   1,243.95x = 2,236,485.52
5. Step 5: Solve for x
   x = 2,236,485.52/1,243.95
6. Step 6: Final answer
   x = 1,797.89