Finding the Fourth Proportional to 13,399.83, 20,096.51 and 8,641.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,399.83 : 20,096.51 = 8,641.49 : x
2. Step 2: Convert to fraction form
   13,399.83/20,096.51 = 8,641.49/x
3. Step 3: Cross multiply
   13,399.83x = 20,096.51 × 8,641.49
4. Step 4: Simplify right side
   13,399.83x = 173,663,646.51
5. Step 5: Solve for x
   x = 173,663,646.51/13,399.83
6. Step 6: Final answer
   x = 12,960.14