Finding the Fourth Proportional to 22,139.46, 30,550.50 and 12,578.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,139.46 : 30,550.50 = 12,578.76 : x
2. Step 2: Convert to fraction form
   22,139.46/30,550.50 = 12,578.76/x
3. Step 3: Cross multiply
   22,139.46x = 30,550.50 × 12,578.76
4. Step 4: Simplify right side
   22,139.46x = 384,287,407.38
5. Step 5: Solve for x
   x = 384,287,407.38/22,139.46
6. Step 6: Final answer
   x = 17,357.58