Finding the Fourth Proportional to 1,719.53, 2,577.56 and 679.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,719.53 : 2,577.56 = 679.12 : x
2. Step 2: Convert to fraction form
   1,719.53/2,577.56 = 679.12/x
3. Step 3: Cross multiply
   1,719.53x = 2,577.56 × 679.12
4. Step 4: Simplify right side
   1,719.53x = 1,750,462.71
5. Step 5: Solve for x
   x = 1,750,462.71/1,719.53
6. Step 6: Final answer
   x = 1,017.99