Finding the Fourth Proportional to 12,093.28, 18,143.20 and 5,069.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,093.28 : 18,143.20 = 5,069.60 : x
2. Step 2: Convert to fraction form
   12,093.28/18,143.20 = 5,069.60/x
3. Step 3: Cross multiply
   12,093.28x = 18,143.20 × 5,069.60
4. Step 4: Simplify right side
   12,093.28x = 91,978,766.72
5. Step 5: Solve for x
   x = 91,978,766.72/12,093.28
6. Step 6: Final answer
   x = 7,605.78