Finding the Fourth Proportional to 1,524.11, 2,100.20 and 1,103.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,524.11 : 2,100.20 = 1,103.72 : x
2. Step 2: Convert to fraction form
   1,524.11/2,100.20 = 1,103.72/x
3. Step 3: Cross multiply
   1,524.11x = 2,100.20 × 1,103.72
4. Step 4: Simplify right side
   1,524.11x = 2,318,016.72
5. Step 5: Solve for x
   x = 2,318,016.72/1,524.11
6. Step 6: Final answer
   x = 1,520.90