Finding the Fourth Proportional to 1,191.72, 1,644.57 and 694.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.72 : 1,644.57 = 694.69 : x
2. Step 2: Convert to fraction form
   1,191.72/1,644.57 = 694.69/x
3. Step 3: Cross multiply
   1,191.72x = 1,644.57 × 694.69
4. Step 4: Simplify right side
   1,191.72x = 1,142,462.86
5. Step 5: Solve for x
   x = 1,142,462.86/1,191.72
6. Step 6: Final answer
   x = 958.67