Finding the Third Proportional to 661.50 and 907.50

Step by Step Solution

1. Step 1: Write the proportion equation
   661.50 : 907.50 = 907.50 : x
2. Step 2: Convert to fraction form
   661.50/907.50 = 907.50/x
3. Step 3: Cross multiply
   661.50x = 907.50 × 907.50
4. Step 4: Simplify right side
   661.50x = 823,556.25
5. Step 5: Solve for x
   x = 823,556.25/661.50
6. Step 6: Final answer
   x = 1,244.98