Finding the Fourth Proportional to 16,420.72, 22,658.95 and 9,250.43

Step by Step Solution

1. Step 1: Write the proportion equation
   16,420.72 : 22,658.95 = 9,250.43 : x
2. Step 2: Convert to fraction form
   16,420.72/22,658.95 = 9,250.43/x
3. Step 3: Cross multiply
   16,420.72x = 22,658.95 × 9,250.43
4. Step 4: Simplify right side
   16,420.72x = 209,605,064.37
5. Step 5: Solve for x
   x = 209,605,064.37/16,420.72
6. Step 6: Final answer
   x = 12,764.67