Finding the Fourth Proportional to 12,648.56, 18,933.96 and 10,782.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.56 : 18,933.96 = 10,782.32 : x
2. Step 2: Convert to fraction form
   12,648.56/18,933.96 = 10,782.32/x
3. Step 3: Cross multiply
   12,648.56x = 18,933.96 × 10,782.32
4. Step 4: Simplify right side
   12,648.56x = 204,152,015.59
5. Step 5: Solve for x
   x = 204,152,015.59/12,648.56
6. Step 6: Final answer
   x = 16,140.34