Finding the Fourth Proportional to 38,429.73, 57,609.50 and 13,456.13

Step by Step Solution

1. Step 1: Write the proportion equation
   38,429.73 : 57,609.50 = 13,456.13 : x
2. Step 2: Convert to fraction form
   38,429.73/57,609.50 = 13,456.13/x
3. Step 3: Cross multiply
   38,429.73x = 57,609.50 × 13,456.13
4. Step 4: Simplify right side
   38,429.73x = 775,200,565.91
5. Step 5: Solve for x
   x = 775,200,565.91/38,429.73
6. Step 6: Final answer
   x = 20,171.90