Finding the Fourth Proportional to 14,662.72, 21,990.71 and 8,741.28

Step by Step Solution

1. Step 1: Write the proportion equation
   14,662.72 : 21,990.71 = 8,741.28 : x
2. Step 2: Convert to fraction form
   14,662.72/21,990.71 = 8,741.28/x
3. Step 3: Cross multiply
   14,662.72x = 21,990.71 × 8,741.28
4. Step 4: Simplify right side
   14,662.72x = 192,226,953.51
5. Step 5: Solve for x
   x = 192,226,953.51/14,662.72
6. Step 6: Final answer
   x = 13,109.91