Finding the Fourth Proportional to 1,078.17, 1,614.48 and 711.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.17 : 1,614.48 = 711.82 : x
2. Step 2: Convert to fraction form
   1,078.17/1,614.48 = 711.82/x
3. Step 3: Cross multiply
   1,078.17x = 1,614.48 × 711.82
4. Step 4: Simplify right side
   1,078.17x = 1,149,219.15
5. Step 5: Solve for x
   x = 1,149,219.15/1,078.17
6. Step 6: Final answer
   x = 1,065.90