Finding the Fourth Proportional to 16,429.13, 22,672.20 and 9,355.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,429.13 : 22,672.20 = 9,355.50 : x
2. Step 2: Convert to fraction form
   16,429.13/22,672.20 = 9,355.50/x
3. Step 3: Cross multiply
   16,429.13x = 22,672.20 × 9,355.50
4. Step 4: Simplify right side
   16,429.13x = 212,109,802.18
5. Step 5: Solve for x
   x = 212,109,802.18/16,429.13
6. Step 6: Final answer
   x = 12,910.59