Finding the Third Proportional to 291.50 and 454.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291.50 : 454.50 = 454.50 : x
2. Step 2: Convert to fraction form
   291.50/454.50 = 454.50/x
3. Step 3: Cross multiply
   291.50x = 454.50 × 454.50
4. Step 4: Simplify right side
   291.50x = 206,570.25
5. Step 5: Solve for x
   x = 206,570.25/291.50
6. Step 6: Final answer
   x = 708.65