Finding the Fourth Proportional to 10,809.77, 16,107.20 and 9,630.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,809.77 : 16,107.20 = 9,630.72 : x
2. Step 2: Convert to fraction form
   10,809.77/16,107.20 = 9,630.72/x
3. Step 3: Cross multiply
   10,809.77x = 16,107.20 × 9,630.72
4. Step 4: Simplify right side
   10,809.77x = 155,123,933.18
5. Step 5: Solve for x
   x = 155,123,933.18/10,809.77
6. Step 6: Final answer
   x = 14,350.35