Finding the Fourth Proportional to 14,664.15, 20,236.56 and 7,949.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,664.15 : 20,236.56 = 7,949.72 : x
2. Step 2: Convert to fraction form
   14,664.15/20,236.56 = 7,949.72/x
3. Step 3: Cross multiply
   14,664.15x = 20,236.56 × 7,949.72
4. Step 4: Simplify right side
   14,664.15x = 160,874,985.76
5. Step 5: Solve for x
   x = 160,874,985.76/14,664.15
6. Step 6: Final answer
   x = 10,970.63