Finding the Fourth Proportional to 12,085.36, 18,120.18 and 5,069.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.36 : 18,120.18 = 5,069.87 : x
2. Step 2: Convert to fraction form
   12,085.36/18,120.18 = 5,069.87/x
3. Step 3: Cross multiply
   12,085.36x = 18,120.18 × 5,069.87
4. Step 4: Simplify right side
   12,085.36x = 91,867,002.28
5. Step 5: Solve for x
   x = 91,867,002.28/12,085.36
6. Step 6: Final answer
   x = 7,601.51