Finding the Fourth Proportional to 16,099.65, 22,217.40 and 10,139.18

Step by Step Solution

1. Step 1: Write the proportion equation
   16,099.65 : 22,217.40 = 10,139.18 : x
2. Step 2: Convert to fraction form
   16,099.65/22,217.40 = 10,139.18/x
3. Step 3: Cross multiply
   16,099.65x = 22,217.40 × 10,139.18
4. Step 4: Simplify right side
   16,099.65x = 225,266,106.65
5. Step 5: Solve for x
   x = 225,266,106.65/16,099.65
6. Step 6: Final answer
   x = 13,991.99