Finding the Fourth Proportional to 22,139.62, 33,212.31 and 8,992.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,139.62 : 33,212.31 = 8,992.42 : x
2. Step 2: Convert to fraction form
   22,139.62/33,212.31 = 8,992.42/x
3. Step 3: Cross multiply
   22,139.62x = 33,212.31 × 8,992.42
4. Step 4: Simplify right side
   22,139.62x = 298,659,040.69
5. Step 5: Solve for x
   x = 298,659,040.69/22,139.62
6. Step 6: Final answer
   x = 13,489.80