Finding the Fourth Proportional to 30,900, 42,641.76 and 16,752.48

Step by Step Solution

1. Step 1: Write the proportion equation
   30,900 : 42,641.76 = 16,752.48 : x
2. Step 2: Convert to fraction form
   30,900/42,641.76 = 16,752.48/x
3. Step 3: Cross multiply
   30,900x = 42,641.76 × 16,752.48
4. Step 4: Simplify right side
   30,900x = 714,355,231.56
5. Step 5: Solve for x
   x = 714,355,231.56/30,900
6. Step 6: Final answer
   x = 23,118.29