Finding the Fourth Proportional to 30,990.32, 42,766.56 and 16,843.16

Step by Step Solution

1. Step 1: Write the proportion equation
   30,990.32 : 42,766.56 = 16,843.16 : x
2. Step 2: Convert to fraction form
   30,990.32/42,766.56 = 16,843.16/x
3. Step 3: Cross multiply
   30,990.32x = 42,766.56 × 16,843.16
4. Step 4: Simplify right side
   30,990.32x = 720,324,012.73
5. Step 5: Solve for x
   x = 720,324,012.73/30,990.32
6. Step 6: Final answer
   x = 23,243.52