Finding the Fourth Proportional to 1,191.69, 1,644.48 and 694.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.69 : 1,644.48 = 694.31 : x
2. Step 2: Convert to fraction form
   1,191.69/1,644.48 = 694.31/x
3. Step 3: Cross multiply
   1,191.69x = 1,644.48 × 694.31
4. Step 4: Simplify right side
   1,191.69x = 1,141,770.69
5. Step 5: Solve for x
   x = 1,141,770.69/1,191.69
6. Step 6: Final answer
   x = 958.11