Finding the Fourth Proportional to 14,499.13, 20,008.79 and 8,212.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,499.13 : 20,008.79 = 8,212.72 : x
2. Step 2: Convert to fraction form
   14,499.13/20,008.79 = 8,212.72/x
3. Step 3: Cross multiply
   14,499.13x = 20,008.79 × 8,212.72
4. Step 4: Simplify right side
   14,499.13x = 164,326,589.81
5. Step 5: Solve for x
   x = 164,326,589.81/14,499.13
6. Step 6: Final answer
   x = 11,333.55