Finding the Fourth Proportional to 1,171.25, 1,616.34 and 647.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.25 : 1,616.34 = 647.33 : x
2. Step 2: Convert to fraction form
   1,171.25/1,616.34 = 647.33/x
3. Step 3: Cross multiply
   1,171.25x = 1,616.34 × 647.33
4. Step 4: Simplify right side
   1,171.25x = 1,046,305.37
5. Step 5: Solve for x
   x = 1,046,305.37/1,171.25
6. Step 6: Final answer
   x = 893.32