Finding the Fourth Proportional to 2,579.31, 3,865.47 and 1,189.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,579.31 : 3,865.47 = 1,189.59 : x
2. Step 2: Convert to fraction form
   2,579.31/3,865.47 = 1,189.59/x
3. Step 3: Cross multiply
   2,579.31x = 3,865.47 × 1,189.59
4. Step 4: Simplify right side
   2,579.31x = 4,598,324.46
5. Step 5: Solve for x
   x = 4,598,324.46/2,579.31
6. Step 6: Final answer
   x = 1,782.77