Finding the Fourth Proportional to 30,658.48, 42,308.66 and 17,920.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,658.48 : 42,308.66 = 17,920.42 : x
2. Step 2: Convert to fraction form
   30,658.48/42,308.66 = 17,920.42/x
3. Step 3: Cross multiply
   30,658.48x = 42,308.66 × 17,920.42
4. Step 4: Simplify right side
   30,658.48x = 758,188,956.84
5. Step 5: Solve for x
   x = 758,188,956.84/30,658.48
6. Step 6: Final answer
   x = 24,730.15