Finding the Fourth Proportional to 1,132.47, 1,697.56 and 644.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,132.47 : 1,697.56 = 644.49 : x
2. Step 2: Convert to fraction form
   1,132.47/1,697.56 = 644.49/x
3. Step 3: Cross multiply
   1,132.47x = 1,697.56 × 644.49
4. Step 4: Simplify right side
   1,132.47x = 1,094,058.83
5. Step 5: Solve for x
   x = 1,094,058.83/1,132.47
6. Step 6: Final answer
   x = 966.08