Finding the Fourth Proportional to 12,216.50, 16,858.86 and 6,627.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,216.50 : 16,858.86 = 6,627.50 : x
2. Step 2: Convert to fraction form
   12,216.50/16,858.86 = 6,627.50/x
3. Step 3: Cross multiply
   12,216.50x = 16,858.86 × 6,627.50
4. Step 4: Simplify right side
   12,216.50x = 111,732,094.65
5. Step 5: Solve for x
   x = 111,732,094.65/12,216.50
6. Step 6: Final answer
   x = 9,146.00