Finding the Fourth Proportional to 2,642.86, 3,961.42 and 1,719.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.86 : 3,961.42 = 1,719.07 : x
2. Step 2: Convert to fraction form
   2,642.86/3,961.42 = 1,719.07/x
3. Step 3: Cross multiply
   2,642.86x = 3,961.42 × 1,719.07
4. Step 4: Simplify right side
   2,642.86x = 6,809,963.89
5. Step 5: Solve for x
   x = 6,809,963.89/2,642.86
6. Step 6: Final answer
   x = 2,576.75