Finding the Fourth Proportional to 12,227.08, 16,870.42 and 7,189.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,227.08 : 16,870.42 = 7,189.60 : x
2. Step 2: Convert to fraction form
   12,227.08/16,870.42 = 7,189.60/x
3. Step 3: Cross multiply
   12,227.08x = 16,870.42 × 7,189.60
4. Step 4: Simplify right side
   12,227.08x = 121,291,571.63
5. Step 5: Solve for x
   x = 121,291,571.63/12,227.08
6. Step 6: Final answer
   x = 9,919.91