Finding the Fourth Proportional to 1,987.58, 2,742.72 and 1,103.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.58 : 2,742.72 = 1,103.35 : x
2. Step 2: Convert to fraction form
   1,987.58/2,742.72 = 1,103.35/x
3. Step 3: Cross multiply
   1,987.58x = 2,742.72 × 1,103.35
4. Step 4: Simplify right side
   1,987.58x = 3,026,180.11
5. Step 5: Solve for x
   x = 3,026,180.11/1,987.58
6. Step 6: Final answer
   x = 1,522.55