Finding the Fourth Proportional to 13,086.36, 18,057.33 and 7,783.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.36 : 18,057.33 = 7,783.29 : x
2. Step 2: Convert to fraction form
   13,086.36/18,057.33 = 7,783.29/x
3. Step 3: Cross multiply
   13,086.36x = 18,057.33 × 7,783.29
4. Step 4: Simplify right side
   13,086.36x = 140,545,436.02
5. Step 5: Solve for x
   x = 140,545,436.02/13,086.36
6. Step 6: Final answer
   x = 10,739.84