Finding the Fourth Proportional to 1,719.72, 2,577.86 and 679.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,719.72 : 2,577.86 = 679.06 : x
2. Step 2: Convert to fraction form
   1,719.72/2,577.86 = 679.06/x
3. Step 3: Cross multiply
   1,719.72x = 2,577.86 × 679.06
4. Step 4: Simplify right side
   1,719.72x = 1,750,521.61
5. Step 5: Solve for x
   x = 1,750,521.61/1,719.72
6. Step 6: Final answer
   x = 1,017.91