Finding the Fourth Proportional to 1,191.98, 1,644.25 and 694.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.98 : 1,644.25 = 694.56 : x
2. Step 2: Convert to fraction form
   1,191.98/1,644.25 = 694.56/x
3. Step 3: Cross multiply
   1,191.98x = 1,644.25 × 694.56
4. Step 4: Simplify right side
   1,191.98x = 1,142,030.28
5. Step 5: Solve for x
   x = 1,142,030.28/1,191.98
6. Step 6: Final answer
   x = 958.10