Finding the Fourth Proportional to 21,364.86, 32,046.94 and 8,220.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,364.86 : 32,046.94 = 8,220.08 : x
2. Step 2: Convert to fraction form
   21,364.86/32,046.94 = 8,220.08/x
3. Step 3: Cross multiply
   21,364.86x = 32,046.94 × 8,220.08
4. Step 4: Simplify right side
   21,364.86x = 263,428,500.95
5. Step 5: Solve for x
   x = 263,428,500.95/21,364.86
6. Step 6: Final answer
   x = 12,329.99