Finding the Fourth Proportional to 1,351.20, 1,865.52 and 1,103.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.20 : 1,865.52 = 1,103.12 : x
2. Step 2: Convert to fraction form
   1,351.20/1,865.52 = 1,103.12/x
3. Step 3: Cross multiply
   1,351.20x = 1,865.52 × 1,103.12
4. Step 4: Simplify right side
   1,351.20x = 2,057,892.42
5. Step 5: Solve for x
   x = 2,057,892.42/1,351.20
6. Step 6: Final answer
   x = 1,523.01