Finding the Fourth Proportional to 16,464.15, 22,720.30 and 9,390.69

Step by Step Solution

1. Step 1: Write the proportion equation
   16,464.15 : 22,720.30 = 9,390.69 : x
2. Step 2: Convert to fraction form
   16,464.15/22,720.30 = 9,390.69/x
3. Step 3: Cross multiply
   16,464.15x = 22,720.30 × 9,390.69
4. Step 4: Simplify right side
   16,464.15x = 213,359,270.53
5. Step 5: Solve for x
   x = 213,359,270.53/16,464.15
6. Step 6: Final answer
   x = 12,959.02