Finding the Fourth Proportional to 30,815.34, 42,525.51 and 16,668.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,815.34 : 42,525.51 = 16,668.42 : x
2. Step 2: Convert to fraction form
   30,815.34/42,525.51 = 16,668.42/x
3. Step 3: Cross multiply
   30,815.34x = 42,525.51 × 16,668.42
4. Step 4: Simplify right side
   30,815.34x = 708,833,061.39
5. Step 5: Solve for x
   x = 708,833,061.39/30,815.34
6. Step 6: Final answer
   x = 23,002.60