Finding the Fourth Proportional to 22,462.28, 30,997.79 and 12,391

Step by Step Solution

1. Step 1: Write the proportion equation
   22,462.28 : 30,997.79 = 12,391 : x
2. Step 2: Convert to fraction form
   22,462.28/30,997.79 = 12,391/x
3. Step 3: Cross multiply
   22,462.28x = 30,997.79 × 12,391
4. Step 4: Simplify right side
   22,462.28x = 384,093,615.89
5. Step 5: Solve for x
   x = 384,093,615.89/22,462.28
6. Step 6: Final answer
   x = 17,099.49