Finding the Fourth Proportional to 23,399.85, 32,290.68 and 12,789.50

Step by Step Solution

1. Step 1: Write the proportion equation
   23,399.85 : 32,290.68 = 12,789.50 : x
2. Step 2: Convert to fraction form
   23,399.85/32,290.68 = 12,789.50/x
3. Step 3: Cross multiply
   23,399.85x = 32,290.68 × 12,789.50
4. Step 4: Simplify right side
   23,399.85x = 412,981,538.37
5. Step 5: Solve for x
   x = 412,981,538.37/23,399.85
6. Step 6: Final answer
   x = 17,648.89