Finding the Fourth Proportional to 16,308.15, 22,507.61 and 9,138.54

Step by Step Solution

1. Step 1: Write the proportion equation
   16,308.15 : 22,507.61 = 9,138.54 : x
2. Step 2: Convert to fraction form
   16,308.15/22,507.61 = 9,138.54/x
3. Step 3: Cross multiply
   16,308.15x = 22,507.61 × 9,138.54
4. Step 4: Simplify right side
   16,308.15x = 205,686,694.29
5. Step 5: Solve for x
   x = 205,686,694.29/16,308.15
6. Step 6: Final answer
   x = 12,612.51