Finding the Third Proportional to 641.25 and 760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   641.25 : 760.50 = 760.50 : x
2. Step 2: Convert to fraction form
   641.25/760.50 = 760.50/x
3. Step 3: Cross multiply
   641.25x = 760.50 × 760.50
4. Step 4: Simplify right side
   641.25x = 578,360.25
5. Step 5: Solve for x
   x = 578,360.25/641.25
6. Step 6: Final answer
   x = 901.93