Finding the Fourth Proportional to 13,149.81, 18,141.17 and 7,843.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,149.81 : 18,141.17 = 7,843.59 : x
2. Step 2: Convert to fraction form
   13,149.81/18,141.17 = 7,843.59/x
3. Step 3: Cross multiply
   13,149.81x = 18,141.17 × 7,843.59
4. Step 4: Simplify right side
   13,149.81x = 142,291,860.38
5. Step 5: Solve for x
   x = 142,291,860.38/13,149.81
6. Step 6: Final answer
   x = 10,820.83