Finding the Fourth Proportional to 2,180.79, 3,008.50 and 1,296.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.79 : 3,008.50 = 1,296.09 : x
2. Step 2: Convert to fraction form
   2,180.79/3,008.50 = 1,296.09/x
3. Step 3: Cross multiply
   2,180.79x = 3,008.50 × 1,296.09
4. Step 4: Simplify right side
   2,180.79x = 3,899,283.52
5. Step 5: Solve for x
   x = 3,899,283.52/2,180.79
6. Step 6: Final answer
   x = 1,788.01