Finding the Fourth Proportional to 17,363.49, 23,961.65 and 9,405.78

Step by Step Solution

1. Step 1: Write the proportion equation
   17,363.49 : 23,961.65 = 9,405.78 : x
2. Step 2: Convert to fraction form
   17,363.49/23,961.65 = 9,405.78/x
3. Step 3: Cross multiply
   17,363.49x = 23,961.65 × 9,405.78
4. Step 4: Simplify right side
   17,363.49x = 225,377,961.31
5. Step 5: Solve for x
   x = 225,377,961.31/17,363.49
6. Step 6: Final answer
   x = 12,979.99