Finding the Fourth Proportional to 12,080.18, 16,782.27 and 11,972.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,080.18 : 16,782.27 = 11,972.05 : x
2. Step 2: Convert to fraction form
   12,080.18/16,782.27 = 11,972.05/x
3. Step 3: Cross multiply
   12,080.18x = 16,782.27 × 11,972.05
4. Step 4: Simplify right side
   12,080.18x = 200,918,175.55
5. Step 5: Solve for x
   x = 200,918,175.55/12,080.18
6. Step 6: Final answer
   x = 16,632.05