Finding the Fourth Proportional to 1,171.29, 1,616.39 and 647.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.29 : 1,616.39 = 647.33 : x
2. Step 2: Convert to fraction form
   1,171.29/1,616.39 = 647.33/x
3. Step 3: Cross multiply
   1,171.29x = 1,616.39 × 647.33
4. Step 4: Simplify right side
   1,171.29x = 1,046,326.42
5. Step 5: Solve for x
   x = 1,046,326.42/1,171.29
6. Step 6: Final answer
   x = 893.31