Finding the Fourth Proportional to 1,036.00, 1,551.43 and 644.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.00 : 1,551.43 = 644.77 : x
2. Step 2: Convert to fraction form
   1,036.00/1,551.43 = 644.77/x
3. Step 3: Cross multiply
   1,036.00x = 1,551.43 × 644.77
4. Step 4: Simplify right side
   1,036.00x = 1,000,304.54
5. Step 5: Solve for x
   x = 1,000,304.54/1,036.00
6. Step 6: Final answer
   x = 965.55