Finding the Fourth Proportional to 1,115.56, 1,674.83 and 719.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,115.56 : 1,674.83 = 719.15 : x
2. Step 2: Convert to fraction form
   1,115.56/1,674.83 = 719.15/x
3. Step 3: Cross multiply
   1,115.56x = 1,674.83 × 719.15
4. Step 4: Simplify right side
   1,115.56x = 1,204,459.98
5. Step 5: Solve for x
   x = 1,204,459.98/1,115.56
6. Step 6: Final answer
   x = 1,079.69