Finding the Fourth Proportional to 14,601.72, 20,150.70 and 8,638.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,601.72 : 20,150.70 = 8,638.50 : x
2. Step 2: Convert to fraction form
   14,601.72/20,150.70 = 8,638.50/x
3. Step 3: Cross multiply
   14,601.72x = 20,150.70 × 8,638.50
4. Step 4: Simplify right side
   14,601.72x = 174,071,821.95
5. Step 5: Solve for x
   x = 174,071,821.95/14,601.72
6. Step 6: Final answer
   x = 11,921.32