Finding the Fourth Proportional to 2,180.48, 3,008.64 and 1,296.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.48 : 3,008.64 = 1,296.56 : x
2. Step 2: Convert to fraction form
   2,180.48/3,008.64 = 1,296.56/x
3. Step 3: Cross multiply
   2,180.48x = 3,008.64 × 1,296.56
4. Step 4: Simplify right side
   2,180.48x = 3,900,882.28
5. Step 5: Solve for x
   x = 3,900,882.28/2,180.48
6. Step 6: Final answer
   x = 1,789.00