Finding the Third Proportional to 641.50 and 1,364

Step by Step Solution

1. Step 1: Write the proportion equation
   641.50 : 1,364 = 1,364 : x
2. Step 2: Convert to fraction form
   641.50/1,364 = 1,364/x
3. Step 3: Cross multiply
   641.50x = 1,364 × 1,364
4. Step 4: Simplify right side
   641.50x = 1,860,496
5. Step 5: Solve for x
   x = 1,860,496/641.50
6. Step 6: Final answer
   x = 2,900.23