Finding the Fourth Proportional to 1,160.76, 1,601.61 and 688.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.76 : 1,601.61 = 688.67 : x
2. Step 2: Convert to fraction form
   1,160.76/1,601.61 = 688.67/x
3. Step 3: Cross multiply
   1,160.76x = 1,601.61 × 688.67
4. Step 4: Simplify right side
   1,160.76x = 1,102,976.17
5. Step 5: Solve for x
   x = 1,102,976.17/1,160.76
6. Step 6: Final answer
   x = 950.22