Finding the Fourth Proportional to 16,139.02, 22,267.92 and 9,420.82

Step by Step Solution

1. Step 1: Write the proportion equation
   16,139.02 : 22,267.92 = 9,420.82 : x
2. Step 2: Convert to fraction form
   16,139.02/22,267.92 = 9,420.82/x
3. Step 3: Cross multiply
   16,139.02x = 22,267.92 × 9,420.82
4. Step 4: Simplify right side
   16,139.02x = 209,782,066.09
5. Step 5: Solve for x
   x = 209,782,066.09/16,139.02
6. Step 6: Final answer
   x = 12,998.44