Finding the Fourth Proportional to 14,846.43, 20,487.60 and 8,131.89

Step by Step Solution

1. Step 1: Write the proportion equation
   14,846.43 : 20,487.60 = 8,131.89 : x
2. Step 2: Convert to fraction form
   14,846.43/20,487.60 = 8,131.89/x
3. Step 3: Cross multiply
   14,846.43x = 20,487.60 × 8,131.89
4. Step 4: Simplify right side
   14,846.43x = 166,602,909.56
5. Step 5: Solve for x
   x = 166,602,909.56/14,846.43
6. Step 6: Final answer
   x = 11,221.75