Finding the Fourth Proportional to 1,191.58, 1,644.71 and 694.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.58 : 1,644.71 = 694.37 : x
2. Step 2: Convert to fraction form
   1,191.58/1,644.71 = 694.37/x
3. Step 3: Cross multiply
   1,191.58x = 1,644.71 × 694.37
4. Step 4: Simplify right side
   1,191.58x = 1,142,037.92
5. Step 5: Solve for x
   x = 1,142,037.92/1,191.58
6. Step 6: Final answer
   x = 958.43