Finding the Fourth Proportional to 21,436.50, 29,582.38 and 12,005.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,436.50 : 29,582.38 = 12,005.06 : x
2. Step 2: Convert to fraction form
   21,436.50/29,582.38 = 12,005.06/x
3. Step 3: Cross multiply
   21,436.50x = 29,582.38 × 12,005.06
4. Step 4: Simplify right side
   21,436.50x = 355,138,290.79
5. Step 5: Solve for x
   x = 355,138,290.79/21,436.50
6. Step 6: Final answer
   x = 16,566.99