Finding the Fourth Proportional to 1,160.25, 1,601.15 and 694.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.25 : 1,601.15 = 694.50 : x
2. Step 2: Convert to fraction form
   1,160.25/1,601.15 = 694.50/x
3. Step 3: Cross multiply
   1,160.25x = 1,601.15 × 694.50
4. Step 4: Simplify right side
   1,160.25x = 1,111,995.20
5. Step 5: Solve for x
   x = 1,111,995.20/1,160.25
6. Step 6: Final answer
   x = 958.41