Finding the Fourth Proportional to 22,311.89, 30,789.87 and 12,240.23

Step by Step Solution

1. Step 1: Write the proportion equation
   22,311.89 : 30,789.87 = 12,240.23 : x
2. Step 2: Convert to fraction form
   22,311.89/30,789.87 = 12,240.23/x
3. Step 3: Cross multiply
   22,311.89x = 30,789.87 × 12,240.23
4. Step 4: Simplify right side
   22,311.89x = 376,875,090.47
5. Step 5: Solve for x
   x = 376,875,090.47/22,311.89
6. Step 6: Final answer
   x = 16,891.22