Finding the Fourth Proportional to 21,605.69, 29,813.18 and 12,043.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,605.69 : 29,813.18 = 12,043.23 : x
2. Step 2: Convert to fraction form
   21,605.69/29,813.18 = 12,043.23/x
3. Step 3: Cross multiply
   21,605.69x = 29,813.18 × 12,043.23
4. Step 4: Simplify right side
   21,605.69x = 359,046,923.56
5. Step 5: Solve for x
   x = 359,046,923.56/21,605.69
6. Step 6: Final answer
   x = 16,618.17