Finding the Fourth Proportional to 1,719.53, 2,578.43 and 842.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,719.53 : 2,578.43 = 842.10 : x
2. Step 2: Convert to fraction form
   1,719.53/2,578.43 = 842.10/x
3. Step 3: Cross multiply
   1,719.53x = 2,578.43 × 842.10
4. Step 4: Simplify right side
   1,719.53x = 2,171,291.69
5. Step 5: Solve for x
   x = 2,171,291.69/1,719.53
6. Step 6: Final answer
   x = 1,262.73