Finding the Fourth Proportional to 16,388.79, 22,616.54 and 9,315.03

Step by Step Solution

1. Step 1: Write the proportion equation
   16,388.79 : 22,616.54 = 9,315.03 : x
2. Step 2: Convert to fraction form
   16,388.79/22,616.54 = 9,315.03/x
3. Step 3: Cross multiply
   16,388.79x = 22,616.54 × 9,315.03
4. Step 4: Simplify right side
   16,388.79x = 210,673,748.60
5. Step 5: Solve for x
   x = 210,673,748.60/16,388.79
6. Step 6: Final answer
   x = 12,854.75