Finding the Fourth Proportional to 16,142.37, 22,275.45 and 9,429.90

Step by Step Solution

1. Step 1: Write the proportion equation
   16,142.37 : 22,275.45 = 9,429.90 : x
2. Step 2: Convert to fraction form
   16,142.37/22,275.45 = 9,429.90/x
3. Step 3: Cross multiply
   16,142.37x = 22,275.45 × 9,429.90
4. Step 4: Simplify right side
   16,142.37x = 210,055,265.96
5. Step 5: Solve for x
   x = 210,055,265.96/16,142.37
6. Step 6: Final answer
   x = 13,012.67