Finding the Fourth Proportional to 16,909.39, 23,333.48 and 9,355.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,909.39 : 23,333.48 = 9,355.60 : x
2. Step 2: Convert to fraction form
   16,909.39/23,333.48 = 9,355.60/x
3. Step 3: Cross multiply
   16,909.39x = 23,333.48 × 9,355.60
4. Step 4: Simplify right side
   16,909.39x = 218,298,588.82
5. Step 5: Solve for x
   x = 218,298,588.82/16,909.39
6. Step 6: Final answer
   x = 12,909.91