Finding the Fourth Proportional to 2,180.79, 3,009.51 and 1,296.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.79 : 3,009.51 = 1,296.42 : x
2. Step 2: Convert to fraction form
   2,180.79/3,009.51 = 1,296.42/x
3. Step 3: Cross multiply
   2,180.79x = 3,009.51 × 1,296.42
4. Step 4: Simplify right side
   2,180.79x = 3,901,588.95
5. Step 5: Solve for x
   x = 3,901,588.95/2,180.79
6. Step 6: Final answer
   x = 1,789.07