Finding the Fourth Proportional to 13,087.11, 18,062.52 and 7,709.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.11 : 18,062.52 = 7,709.83 : x
2. Step 2: Convert to fraction form
   13,087.11/18,062.52 = 7,709.83/x
3. Step 3: Cross multiply
   13,087.11x = 18,062.52 × 7,709.83
4. Step 4: Simplify right side
   13,087.11x = 139,258,958.57
5. Step 5: Solve for x
   x = 139,258,958.57/13,087.11
6. Step 6: Final answer
   x = 10,640.93