Finding the Fourth Proportional to 16,642.71, 22,945.05 and 12,818.64

Step by Step Solution

1. Step 1: Write the proportion equation
   16,642.71 : 22,945.05 = 12,818.64 : x
2. Step 2: Convert to fraction form
   16,642.71/22,945.05 = 12,818.64/x
3. Step 3: Cross multiply
   16,642.71x = 22,945.05 × 12,818.64
4. Step 4: Simplify right side
   16,642.71x = 294,124,335.73
5. Step 5: Solve for x
   x = 294,124,335.73/16,642.71
6. Step 6: Final answer
   x = 17,672.86