Finding the Fourth Proportional to 30,912.30, 42,658.56 and 16,764.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,912.30 : 42,658.56 = 16,764.96 : x
2. Step 2: Convert to fraction form
   30,912.30/42,658.56 = 16,764.96/x
3. Step 3: Cross multiply
   30,912.30x = 42,658.56 × 16,764.96
4. Step 4: Simplify right side
   30,912.30x = 715,169,052.06
5. Step 5: Solve for x
   x = 715,169,052.06/30,912.30
6. Step 6: Final answer
   x = 23,135.42