Finding the Fourth Proportional to 21,859.50, 32,789.34 and 8,008.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,859.50 : 32,789.34 = 8,008.50 : x
2. Step 2: Convert to fraction form
   21,859.50/32,789.34 = 8,008.50/x
3. Step 3: Cross multiply
   21,859.50x = 32,789.34 × 8,008.50
4. Step 4: Simplify right side
   21,859.50x = 262,593,429.39
5. Step 5: Solve for x
   x = 262,593,429.39/21,859.50
6. Step 6: Final answer
   x = 12,012.78