Finding the Fourth Proportional to 16,890.85, 23,309.90 and 9,337.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,890.85 : 23,309.90 = 9,337.42 : x
2. Step 2: Convert to fraction form
   16,890.85/23,309.90 = 9,337.42/x
3. Step 3: Cross multiply
   16,890.85x = 23,309.90 × 9,337.42
4. Step 4: Simplify right side
   16,890.85x = 217,654,291.53
5. Step 5: Solve for x
   x = 217,654,291.53/16,890.85
6. Step 6: Final answer
   x = 12,885.93