Finding the Fourth Proportional to 10,900.50, 16,350.90 and 3,109.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,900.50 : 16,350.90 = 3,109.31 : x
2. Step 2: Convert to fraction form
   10,900.50/16,350.90 = 3,109.31/x
3. Step 3: Cross multiply
   10,900.50x = 16,350.90 × 3,109.31
4. Step 4: Simplify right side
   10,900.50x = 50,840,069.42
5. Step 5: Solve for x
   x = 50,840,069.42/10,900.50
6. Step 6: Final answer
   x = 4,664.01