Finding the Fourth Proportional to 13,143.30, 18,131.22 and 7,834.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,143.30 : 18,131.22 = 7,834.38 : x
2. Step 2: Convert to fraction form
   13,143.30/18,131.22 = 7,834.38/x
3. Step 3: Cross multiply
   13,143.30x = 18,131.22 × 7,834.38
4. Step 4: Simplify right side
   13,143.30x = 142,046,867.34
5. Step 5: Solve for x
   x = 142,046,867.34/13,143.30
6. Step 6: Final answer
   x = 10,807.55