Finding the Fourth Proportional to 1,131.02, 1,694.70 and 644.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.02 : 1,694.70 = 644.42 : x
2. Step 2: Convert to fraction form
   1,131.02/1,694.70 = 644.42/x
3. Step 3: Cross multiply
   1,131.02x = 1,694.70 × 644.42
4. Step 4: Simplify right side
   1,131.02x = 1,092,098.57
5. Step 5: Solve for x
   x = 1,092,098.57/1,131.02
6. Step 6: Final answer
   x = 965.59