Finding the Fourth Proportional to 14,764.27, 20,372.89 and 8,390.83

Step by Step Solution

1. Step 1: Write the proportion equation
   14,764.27 : 20,372.89 = 8,390.83 : x
2. Step 2: Convert to fraction form
   14,764.27/20,372.89 = 8,390.83/x
3. Step 3: Cross multiply
   14,764.27x = 20,372.89 × 8,390.83
4. Step 4: Simplify right side
   14,764.27x = 170,945,456.60
5. Step 5: Solve for x
   x = 170,945,456.60/14,764.27
6. Step 6: Final answer
   x = 11,578.32