Finding the Fourth Proportional to 21,473.56, 29,632.01 and 12,399.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,473.56 : 29,632.01 = 12,399.29 : x
2. Step 2: Convert to fraction form
   21,473.56/29,632.01 = 12,399.29/x
3. Step 3: Cross multiply
   21,473.56x = 29,632.01 × 12,399.29
4. Step 4: Simplify right side
   21,473.56x = 367,415,885.27
5. Step 5: Solve for x
   x = 367,415,885.27/21,473.56
6. Step 6: Final answer
   x = 17,110.15