Finding the Fourth Proportional to 13,506.86, 18,640.52 and 7,843.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,506.86 : 18,640.52 = 7,843.38 : x
2. Step 2: Convert to fraction form
   13,506.86/18,640.52 = 7,843.38/x
3. Step 3: Cross multiply
   13,506.86x = 18,640.52 × 7,843.38
4. Step 4: Simplify right side
   13,506.86x = 146,204,642.54
5. Step 5: Solve for x
   x = 146,204,642.54/13,506.86
6. Step 6: Final answer
   x = 10,824.48