Finding the Fourth Proportional to 22,315.78, 33,470.76 and 12,960.82

Step by Step Solution

1. Step 1: Write the proportion equation
   22,315.78 : 33,470.76 = 12,960.82 : x
2. Step 2: Convert to fraction form
   22,315.78/33,470.76 = 12,960.82/x
3. Step 3: Cross multiply
   22,315.78x = 33,470.76 × 12,960.82
4. Step 4: Simplify right side
   22,315.78x = 433,808,495.62
5. Step 5: Solve for x
   x = 433,808,495.62/22,315.78
6. Step 6: Final answer
   x = 19,439.54