Finding the Fourth Proportional to 1,987.91, 2,743.37 and 1,103.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.91 : 2,743.37 = 1,103.78 : x
2. Step 2: Convert to fraction form
   1,987.91/2,743.37 = 1,103.78/x
3. Step 3: Cross multiply
   1,987.91x = 2,743.37 × 1,103.78
4. Step 4: Simplify right side
   1,987.91x = 3,028,057.70
5. Step 5: Solve for x
   x = 3,028,057.70/1,987.91
6. Step 6: Final answer
   x = 1,523.23