Finding the Fourth Proportional to 11,783.10, 16,260.72 and 6,478.24

Step by Step Solution

1. Step 1: Write the proportion equation
   11,783.10 : 16,260.72 = 6,478.24 : x
2. Step 2: Convert to fraction form
   11,783.10/16,260.72 = 6,478.24/x
3. Step 3: Cross multiply
   11,783.10x = 16,260.72 × 6,478.24
4. Step 4: Simplify right side
   11,783.10x = 105,340,846.73
5. Step 5: Solve for x
   x = 105,340,846.73/11,783.10
6. Step 6: Final answer
   x = 8,939.99