Finding the Fourth Proportional to 1,160.23, 1,601.15 and 688.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.23 : 1,601.15 = 688.12 : x
2. Step 2: Convert to fraction form
   1,160.23/1,601.15 = 688.12/x
3. Step 3: Cross multiply
   1,160.23x = 1,601.15 × 688.12
4. Step 4: Simplify right side
   1,160.23x = 1,101,775.89
5. Step 5: Solve for x
   x = 1,101,775.89/1,160.23
6. Step 6: Final answer
   x = 949.62