Finding the Fourth Proportional to 1,171.75, 1,617.03 and 647.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.75 : 1,617.03 = 647.83 : x
2. Step 2: Convert to fraction form
   1,171.75/1,617.03 = 647.83/x
3. Step 3: Cross multiply
   1,171.75x = 1,617.03 × 647.83
4. Step 4: Simplify right side
   1,171.75x = 1,047,560.54
5. Step 5: Solve for x
   x = 1,047,560.54/1,171.75
6. Step 6: Final answer
   x = 894.01