Finding the Fourth Proportional to 14,612.89, 21,890.49 and 9,667.57

Step by Step Solution

1. Step 1: Write the proportion equation
   14,612.89 : 21,890.49 = 9,667.57 : x
2. Step 2: Convert to fraction form
   14,612.89/21,890.49 = 9,667.57/x
3. Step 3: Cross multiply
   14,612.89x = 21,890.49 × 9,667.57
4. Step 4: Simplify right side
   14,612.89x = 211,627,844.41
5. Step 5: Solve for x
   x = 211,627,844.41/14,612.89
6. Step 6: Final answer
   x = 14,482.27