Finding the Fourth Proportional to 1,171.75, 1,617.02 and 647.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.75 : 1,617.02 = 647.82 : x
2. Step 2: Convert to fraction form
   1,171.75/1,617.02 = 647.82/x
3. Step 3: Cross multiply
   1,171.75x = 1,617.02 × 647.82
4. Step 4: Simplify right side
   1,171.75x = 1,047,537.90
5. Step 5: Solve for x
   x = 1,047,537.90/1,171.75
6. Step 6: Final answer
   x = 893.99