Finding the Third Proportional to 961.56 and 1,155.67

Step by Step Solution

1. Step 1: Write the proportion equation
   961.56 : 1,155.67 = 1,155.67 : x
2. Step 2: Convert to fraction form
   961.56/1,155.67 = 1,155.67/x
3. Step 3: Cross multiply
   961.56x = 1,155.67 × 1,155.67
4. Step 4: Simplify right side
   961.56x = 1,335,582.00
5. Step 5: Solve for x
   x = 1,335,582.00/961.56
6. Step 6: Final answer
   x = 1,388.98