Finding the Third Proportional to 911.50 and 992.50

Step by Step Solution

1. Step 1: Write the proportion equation
   911.50 : 992.50 = 992.50 : x
2. Step 2: Convert to fraction form
   911.50/992.50 = 992.50/x
3. Step 3: Cross multiply
   911.50x = 992.50 × 992.50
4. Step 4: Simplify right side
   911.50x = 985,056.25
5. Step 5: Solve for x
   x = 985,056.25/911.50
6. Step 6: Final answer
   x = 1,080.70