Finding the Fourth Proportional to 16,419.15, 22,658.41 and 9,707.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,419.15 : 22,658.41 = 9,707.20 : x
2. Step 2: Convert to fraction form
   16,419.15/22,658.41 = 9,707.20/x
3. Step 3: Cross multiply
   16,419.15x = 22,658.41 × 9,707.20
4. Step 4: Simplify right side
   16,419.15x = 219,949,717.55
5. Step 5: Solve for x
   x = 219,949,717.55/16,419.15
6. Step 6: Final answer
   x = 13,395.93