Finding the Fourth Proportional to 13,169.76, 18,174.56 and 7,863.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,169.76 : 18,174.56 = 7,863.59 : x
2. Step 2: Convert to fraction form
   13,169.76/18,174.56 = 7,863.59/x
3. Step 3: Cross multiply
   13,169.76x = 18,174.56 × 7,863.59
4. Step 4: Simplify right side
   13,169.76x = 142,917,158.08
5. Step 5: Solve for x
   x = 142,917,158.08/13,169.76
6. Step 6: Final answer
   x = 10,851.92