Finding the Fourth Proportional to 12,057.30, 18,102.15 and 7,683.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,057.30 : 18,102.15 = 7,683.30 : x
2. Step 2: Convert to fraction form
   12,057.30/18,102.15 = 7,683.30/x
3. Step 3: Cross multiply
   12,057.30x = 18,102.15 × 7,683.30
4. Step 4: Simplify right side
   12,057.30x = 139,084,249.10
5. Step 5: Solve for x
   x = 139,084,249.10/12,057.30
6. Step 6: Final answer
   x = 11,535.27