Finding the Fourth Proportional to 16,518.22, 22,789.56 and 9,439.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,518.22 : 22,789.56 = 9,439.60 : x
2. Step 2: Convert to fraction form
   16,518.22/22,789.56 = 9,439.60/x
3. Step 3: Cross multiply
   16,518.22x = 22,789.56 × 9,439.60
4. Step 4: Simplify right side
   16,518.22x = 215,124,330.58
5. Step 5: Solve for x
   x = 215,124,330.58/16,518.22
6. Step 6: Final answer
   x = 13,023.46