Finding the Fourth Proportional to 30,920.86, 42,670.24 and 17,491.76

Step by Step Solution

1. Step 1: Write the proportion equation
   30,920.86 : 42,670.24 = 17,491.76 : x
2. Step 2: Convert to fraction form
   30,920.86/42,670.24 = 17,491.76/x
3. Step 3: Cross multiply
   30,920.86x = 42,670.24 × 17,491.76
4. Step 4: Simplify right side
   30,920.86x = 746,377,838.57
5. Step 5: Solve for x
   x = 746,377,838.57/30,920.86
6. Step 6: Final answer
   x = 24,138.33