Finding the Fourth Proportional to 12,089.50, 16,683.57 and 7,057.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,089.50 : 16,683.57 = 7,057.21 : x
2. Step 2: Convert to fraction form
   12,089.50/16,683.57 = 7,057.21/x
3. Step 3: Cross multiply
   12,089.50x = 16,683.57 × 7,057.21
4. Step 4: Simplify right side
   12,089.50x = 117,739,457.04
5. Step 5: Solve for x
   x = 117,739,457.04/12,089.50
6. Step 6: Final answer
   x = 9,738.98