Finding the Fourth Proportional to 13,089.12, 18,066.84 and 7,986.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,089.12 : 18,066.84 = 7,986.48 : x
2. Step 2: Convert to fraction form
   13,089.12/18,066.84 = 7,986.48/x
3. Step 3: Cross multiply
   13,089.12x = 18,066.84 × 7,986.48
4. Step 4: Simplify right side
   13,089.12x = 144,290,456.32
5. Step 5: Solve for x
   x = 144,290,456.32/13,089.12
6. Step 6: Final answer
   x = 11,023.69