Finding the Fourth Proportional to 13,148.43, 18,142.65 and 7,841.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,148.43 : 18,142.65 = 7,841.31 : x
2. Step 2: Convert to fraction form
   13,148.43/18,142.65 = 7,841.31/x
3. Step 3: Cross multiply
   13,148.43x = 18,142.65 × 7,841.31
4. Step 4: Simplify right side
   13,148.43x = 142,262,142.87
5. Step 5: Solve for x
   x = 142,262,142.87/13,148.43
6. Step 6: Final answer
   x = 10,819.71