Finding the Fourth Proportional to 1,987.49, 2,742.82 and 1,103.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.49 : 2,742.82 = 1,103.30 : x
2. Step 2: Convert to fraction form
   1,987.49/2,742.82 = 1,103.30/x
3. Step 3: Cross multiply
   1,987.49x = 2,742.82 × 1,103.30
4. Step 4: Simplify right side
   1,987.49x = 3,026,140.97
5. Step 5: Solve for x
   x = 3,026,140.97/1,987.49
6. Step 6: Final answer
   x = 1,522.59