Finding the Fourth Proportional to 13,103.50, 18,080.36 and 7,727.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,103.50 : 18,080.36 = 7,727.63 : x
2. Step 2: Convert to fraction form
   13,103.50/18,080.36 = 7,727.63/x
3. Step 3: Cross multiply
   13,103.50x = 18,080.36 × 7,727.63
4. Step 4: Simplify right side
   13,103.50x = 139,718,203.31
5. Step 5: Solve for x
   x = 139,718,203.31/13,103.50
6. Step 6: Final answer
   x = 10,662.66