Finding the Fourth Proportional to 9,355.23, 12,909.78 and 5,105.97

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.23 : 12,909.78 = 5,105.97 : x
2. Step 2: Convert to fraction form
   9,355.23/12,909.78 = 5,105.97/x
3. Step 3: Cross multiply
   9,355.23x = 12,909.78 × 5,105.97
4. Step 4: Simplify right side
   9,355.23x = 65,916,949.39
5. Step 5: Solve for x
   x = 65,916,949.39/9,355.23
6. Step 6: Final answer
   x = 7,046.00