Finding the Fourth Proportional to 1,171.47, 1,616.52 and 647.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.47 : 1,616.52 = 647.49 : x
2. Step 2: Convert to fraction form
   1,171.47/1,616.52 = 647.49/x
3. Step 3: Cross multiply
   1,171.47x = 1,616.52 × 647.49
4. Step 4: Simplify right side
   1,171.47x = 1,046,680.53
5. Step 5: Solve for x
   x = 1,046,680.53/1,171.47
6. Step 6: Final answer
   x = 893.48