Finding the Fourth Proportional to 16,789.75, 23,166.21 and 10,820.05

Step by Step Solution

1. Step 1: Write the proportion equation
   16,789.75 : 23,166.21 = 10,820.05 : x
2. Step 2: Convert to fraction form
   16,789.75/23,166.21 = 10,820.05/x
3. Step 3: Cross multiply
   16,789.75x = 23,166.21 × 10,820.05
4. Step 4: Simplify right side
   16,789.75x = 250,659,550.51
5. Step 5: Solve for x
   x = 250,659,550.51/16,789.75
6. Step 6: Final answer
   x = 14,929.32