Finding the Fourth Proportional to 13,141.49, 18,134.42 and 7,836.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,141.49 : 18,134.42 = 7,836.39 : x
2. Step 2: Convert to fraction form
   13,141.49/18,134.42 = 7,836.39/x
3. Step 3: Cross multiply
   13,141.49x = 18,134.42 × 7,836.39
4. Step 4: Simplify right side
   13,141.49x = 142,108,348.36
5. Step 5: Solve for x
   x = 142,108,348.36/13,141.49
6. Step 6: Final answer
   x = 10,813.72