Finding the Fourth Proportional to 21,061.82, 29,065.20 and 11,630.39

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.82 : 29,065.20 = 11,630.39 : x
2. Step 2: Convert to fraction form
   21,061.82/29,065.20 = 11,630.39/x
3. Step 3: Cross multiply
   21,061.82x = 29,065.20 × 11,630.39
4. Step 4: Simplify right side
   21,061.82x = 338,039,466.10
5. Step 5: Solve for x
   x = 338,039,466.10/21,061.82
6. Step 6: Final answer
   x = 16,049.87