Finding the Fourth Proportional to 16,391.56, 22,615.06 and 9,679.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,391.56 : 22,615.06 = 9,679.42 : x
2. Step 2: Convert to fraction form
   16,391.56/22,615.06 = 9,679.42/x
3. Step 3: Cross multiply
   16,391.56x = 22,615.06 × 9,679.42
4. Step 4: Simplify right side
   16,391.56x = 218,900,664.07
5. Step 5: Solve for x
   x = 218,900,664.07/16,391.56
6. Step 6: Final answer
   x = 13,354.48