Finding the Fourth Proportional to 20,081.32, 27,721.86 and 14,118.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,081.32 : 27,721.86 = 14,118.10 : x
2. Step 2: Convert to fraction form
   20,081.32/27,721.86 = 14,118.10/x
3. Step 3: Cross multiply
   20,081.32x = 27,721.86 × 14,118.10
4. Step 4: Simplify right side
   20,081.32x = 391,379,991.67
5. Step 5: Solve for x
   x = 391,379,991.67/20,081.32
6. Step 6: Final answer
   x = 19,489.75