Finding the Fourth Proportional to 16,142.12, 22,275.11 and 9,429.65

Step by Step Solution

1. Step 1: Write the proportion equation
   16,142.12 : 22,275.11 = 9,429.65 : x
2. Step 2: Convert to fraction form
   16,142.12/22,275.11 = 9,429.65/x
3. Step 3: Cross multiply
   16,142.12x = 22,275.11 × 9,429.65
4. Step 4: Simplify right side
   16,142.12x = 210,046,443.86
5. Step 5: Solve for x
   x = 210,046,443.86/16,142.12
6. Step 6: Final answer
   x = 13,012.32