Finding the Fourth Proportional to 30,843.12, 42,564 and 18,105.48

Step by Step Solution

1. Step 1: Write the proportion equation
   30,843.12 : 42,564 = 18,105.48 : x
2. Step 2: Convert to fraction form
   30,843.12/42,564 = 18,105.48/x
3. Step 3: Cross multiply
   30,843.12x = 42,564 × 18,105.48
4. Step 4: Simplify right side
   30,843.12x = 770,641,650.72
5. Step 5: Solve for x
   x = 770,641,650.72/30,843.12
6. Step 6: Final answer
   x = 24,985.85