Finding the Fourth Proportional to 14,920.69, 20,590.72 and 8,206.43

Step by Step Solution

1. Step 1: Write the proportion equation
   14,920.69 : 20,590.72 = 8,206.43 : x
2. Step 2: Convert to fraction form
   14,920.69/20,590.72 = 8,206.43/x
3. Step 3: Cross multiply
   14,920.69x = 20,590.72 × 8,206.43
4. Step 4: Simplify right side
   14,920.69x = 168,976,209.63
5. Step 5: Solve for x
   x = 168,976,209.63/14,920.69
6. Step 6: Final answer
   x = 11,324.96