Finding the Fourth Proportional to 1,164.04, 1,744.90 and 644.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.04 : 1,744.90 = 644.28 : x
2. Step 2: Convert to fraction form
   1,164.04/1,744.90 = 644.28/x
3. Step 3: Cross multiply
   1,164.04x = 1,744.90 × 644.28
4. Step 4: Simplify right side
   1,164.04x = 1,124,196.02
5. Step 5: Solve for x
   x = 1,124,196.02/1,164.04
6. Step 6: Final answer
   x = 965.77