Finding the Fourth Proportional to 30,949.47, 46,392.42 and 12,221.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,949.47 : 46,392.42 = 12,221.91 : x
2. Step 2: Convert to fraction form
   30,949.47/46,392.42 = 12,221.91/x
3. Step 3: Cross multiply
   30,949.47x = 46,392.42 × 12,221.91
4. Step 4: Simplify right side
   30,949.47x = 567,004,123.86
5. Step 5: Solve for x
   x = 567,004,123.86/30,949.47
6. Step 6: Final answer
   x = 18,320.32