Finding the Fourth Proportional to 10,905.40, 16,354.50 and 3,508.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,905.40 : 16,354.50 = 3,508.09 : x
2. Step 2: Convert to fraction form
   10,905.40/16,354.50 = 3,508.09/x
3. Step 3: Cross multiply
   10,905.40x = 16,354.50 × 3,508.09
4. Step 4: Simplify right side
   10,905.40x = 57,373,057.91
5. Step 5: Solve for x
   x = 57,373,057.91/10,905.40
6. Step 6: Final answer
   x = 5,260.98