Finding the Fourth Proportional to 16,457.55, 22,705.50 and 9,379.89

Step by Step Solution

1. Step 1: Write the proportion equation
   16,457.55 : 22,705.50 = 9,379.89 : x
2. Step 2: Convert to fraction form
   16,457.55/22,705.50 = 9,379.89/x
3. Step 3: Cross multiply
   16,457.55x = 22,705.50 × 9,379.89
4. Step 4: Simplify right side
   16,457.55x = 212,975,092.40
5. Step 5: Solve for x
   x = 212,975,092.40/16,457.55
6. Step 6: Final answer
   x = 12,940.87