Finding the Fourth Proportional to 1,987.42, 2,742.52 and 1,103.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.42 : 2,742.52 = 1,103.21 : x
2. Step 2: Convert to fraction form
   1,987.42/2,742.52 = 1,103.21/x
3. Step 3: Cross multiply
   1,987.42x = 2,742.52 × 1,103.21
4. Step 4: Simplify right side
   1,987.42x = 3,025,575.49
5. Step 5: Solve for x
   x = 3,025,575.49/1,987.42
6. Step 6: Final answer
   x = 1,522.36