Finding the Fourth Proportional to 1,171.52, 1,616.73 and 647.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.52 : 1,616.73 = 647.57 : x
2. Step 2: Convert to fraction form
   1,171.52/1,616.73 = 647.57/x
3. Step 3: Cross multiply
   1,171.52x = 1,616.73 × 647.57
4. Step 4: Simplify right side
   1,171.52x = 1,046,945.85
5. Step 5: Solve for x
   x = 1,046,945.85/1,171.52
6. Step 6: Final answer
   x = 893.66