Finding the Fourth Proportional to 13,105.34, 18,086.19 and 7,800.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.34 : 18,086.19 = 7,800.38 : x
2. Step 2: Convert to fraction form
   13,105.34/18,086.19 = 7,800.38/x
3. Step 3: Cross multiply
   13,105.34x = 18,086.19 × 7,800.38
4. Step 4: Simplify right side
   13,105.34x = 141,079,154.75
5. Step 5: Solve for x
   x = 141,079,154.75/13,105.34
6. Step 6: Final answer
   x = 10,765.01