Finding the Fourth Proportional to 1,171.43, 1,616.54 and 647.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.43 : 1,616.54 = 647.46 : x
2. Step 2: Convert to fraction form
   1,171.43/1,616.54 = 647.46/x
3. Step 3: Cross multiply
   1,171.43x = 1,616.54 × 647.46
4. Step 4: Simplify right side
   1,171.43x = 1,046,636.91
5. Step 5: Solve for x
   x = 1,046,636.91/1,171.43
6. Step 6: Final answer
   x = 893.47