Finding the Fourth Proportional to 22,667.78, 33,978.89 and 8,624.21

Step by Step Solution

1. Step 1: Write the proportion equation
   22,667.78 : 33,978.89 = 8,624.21 : x
2. Step 2: Convert to fraction form
   22,667.78/33,978.89 = 8,624.21/x
3. Step 3: Cross multiply
   22,667.78x = 33,978.89 × 8,624.21
4. Step 4: Simplify right side
   22,667.78x = 293,040,934.59
5. Step 5: Solve for x
   x = 293,040,934.59/22,667.78
6. Step 6: Final answer
   x = 12,927.64