Finding the Fourth Proportional to 12,418.50, 18,584.78 and 7,672.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,418.50 : 18,584.78 = 7,672.71 : x
2. Step 2: Convert to fraction form
   12,418.50/18,584.78 = 7,672.71/x
3. Step 3: Cross multiply
   12,418.50x = 18,584.78 × 7,672.71
4. Step 4: Simplify right side
   12,418.50x = 142,595,627.35
5. Step 5: Solve for x
   x = 142,595,627.35/12,418.50
6. Step 6: Final answer
   x = 11,482.52