Finding the Fourth Proportional to 1,171.30, 1,616.39 and 647.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.30 : 1,616.39 = 647.34 : x
2. Step 2: Convert to fraction form
   1,171.30/1,616.39 = 647.34/x
3. Step 3: Cross multiply
   1,171.30x = 1,616.39 × 647.34
4. Step 4: Simplify right side
   1,171.30x = 1,046,342.58
5. Step 5: Solve for x
   x = 1,046,342.58/1,171.30
6. Step 6: Final answer
   x = 893.32