Finding the Fourth Proportional to 1,987.48, 2,742.63 and 1,103.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.48 : 2,742.63 = 1,103.28 : x
2. Step 2: Convert to fraction form
   1,987.48/2,742.63 = 1,103.28/x
3. Step 3: Cross multiply
   1,987.48x = 2,742.63 × 1,103.28
4. Step 4: Simplify right side
   1,987.48x = 3,025,888.83
5. Step 5: Solve for x
   x = 3,025,888.83/1,987.48
6. Step 6: Final answer
   x = 1,522.48