Finding the Fourth Proportional to 30,900.12, 42,642.18 and 16,753

Step by Step Solution

1. Step 1: Write the proportion equation
   30,900.12 : 42,642.18 = 16,753 : x
2. Step 2: Convert to fraction form
   30,900.12/42,642.18 = 16,753/x
3. Step 3: Cross multiply
   30,900.12x = 42,642.18 × 16,753
4. Step 4: Simplify right side
   30,900.12x = 714,384,441.54
5. Step 5: Solve for x
   x = 714,384,441.54/30,900.12
6. Step 6: Final answer
   x = 23,119.15