Finding the Fourth Proportional to 30,815.16, 42,524.70 and 16,667.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,815.16 : 42,524.70 = 16,667.96 : x
2. Step 2: Convert to fraction form
   30,815.16/42,524.70 = 16,667.96/x
3. Step 3: Cross multiply
   30,815.16x = 42,524.70 × 16,667.96
4. Step 4: Simplify right side
   30,815.16x = 708,799,998.61
5. Step 5: Solve for x
   x = 708,799,998.61/30,815.16
6. Step 6: Final answer
   x = 23,001.67