Finding the Fourth Proportional to 2,059.20, 3,086.72 and 1,180.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.20 : 3,086.72 = 1,180.80 : x
2. Step 2: Convert to fraction form
   2,059.20/3,086.72 = 1,180.80/x
3. Step 3: Cross multiply
   2,059.20x = 3,086.72 × 1,180.80
4. Step 4: Simplify right side
   2,059.20x = 3,644,798.98
5. Step 5: Solve for x
   x = 3,644,798.98/2,059.20
6. Step 6: Final answer
   x = 1,770.01