Finding the Fourth Proportional to 20,107, 30,156.32 and 7,622.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,107 : 30,156.32 = 7,622.72 : x
2. Step 2: Convert to fraction form
   20,107/30,156.32 = 7,622.72/x
3. Step 3: Cross multiply
   20,107x = 30,156.32 × 7,622.72
4. Step 4: Simplify right side
   20,107x = 229,873,183.59
5. Step 5: Solve for x
   x = 229,873,183.59/20,107
6. Step 6: Final answer
   x = 11,432.50