Finding the Fourth Proportional to 16,638.21, 22,963.50 and 9,469.71

Step by Step Solution

1. Step 1: Write the proportion equation
   16,638.21 : 22,963.50 = 9,469.71 : x
2. Step 2: Convert to fraction form
   16,638.21/22,963.50 = 9,469.71/x
3. Step 3: Cross multiply
   16,638.21x = 22,963.50 × 9,469.71
4. Step 4: Simplify right side
   16,638.21x = 217,457,685.59
5. Step 5: Solve for x
   x = 217,457,685.59/16,638.21
6. Step 6: Final answer
   x = 13,069.78