Finding the Fourth Proportional to 30,811.34, 42,519.61 and 16,664.15

Step by Step Solution

1. Step 1: Write the proportion equation
   30,811.34 : 42,519.61 = 16,664.15 : x
2. Step 2: Convert to fraction form
   30,811.34/42,519.61 = 16,664.15/x
3. Step 3: Cross multiply
   30,811.34x = 42,519.61 × 16,664.15
4. Step 4: Simplify right side
   30,811.34x = 708,553,158.98
5. Step 5: Solve for x
   x = 708,553,158.98/30,811.34
6. Step 6: Final answer
   x = 22,996.51