Finding the Fourth Proportional to 1,719.43, 2,577.78 and 744.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,719.43 : 2,577.78 = 744.85 : x
2. Step 2: Convert to fraction form
   1,719.43/2,577.78 = 744.85/x
3. Step 3: Cross multiply
   1,719.43x = 2,577.78 × 744.85
4. Step 4: Simplify right side
   1,719.43x = 1,920,059.43
5. Step 5: Solve for x
   x = 1,920,059.43/1,719.43
6. Step 6: Final answer
   x = 1,116.68