Finding the Fourth Proportional to 16,143.15, 22,279.63 and 9,069.57

Step by Step Solution

1. Step 1: Write the proportion equation
   16,143.15 : 22,279.63 = 9,069.57 : x
2. Step 2: Convert to fraction form
   16,143.15/22,279.63 = 9,069.57/x
3. Step 3: Cross multiply
   16,143.15x = 22,279.63 × 9,069.57
4. Step 4: Simplify right side
   16,143.15x = 202,066,663.86
5. Step 5: Solve for x
   x = 202,066,663.86/16,143.15
6. Step 6: Final answer
   x = 12,517.18