Finding the Fourth Proportional to 16,388.22, 22,615.02 and 9,315.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16,388.22 : 22,615.02 = 9,315.30 : x
2. Step 2: Convert to fraction form
   16,388.22/22,615.02 = 9,315.30/x
3. Step 3: Cross multiply
   16,388.22x = 22,615.02 × 9,315.30
4. Step 4: Simplify right side
   16,388.22x = 210,665,695.81
5. Step 5: Solve for x
   x = 210,665,695.81/16,388.22
6. Step 6: Final answer
   x = 12,854.70