Finding the Fourth Proportional to 9,920.69, 14,949.30 and 8,204.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.69 : 14,949.30 = 8,204.29 : x
2. Step 2: Convert to fraction form
   9,920.69/14,949.30 = 8,204.29/x
3. Step 3: Cross multiply
   9,920.69x = 14,949.30 × 8,204.29
4. Step 4: Simplify right side
   9,920.69x = 122,648,451.77
5. Step 5: Solve for x
   x = 122,648,451.77/9,920.69
6. Step 6: Final answer
   x = 12,362.89