Finding the Third Proportional to 486,399 and 654,808.50

Step by Step Solution

1. Step 1: Write the proportion equation
   486,399 : 654,808.50 = 654,808.50 : x
2. Step 2: Convert to fraction form
   486,399/654,808.50 = 654,808.50/x
3. Step 3: Cross multiply
   486,399x = 654,808.50 × 654,808.50
4. Step 4: Simplify right side
   486,399x = 428,774,171,672.25
5. Step 5: Solve for x
   x = 428,774,171,672.25/486,399
6. Step 6: Final answer
   x = 881,527.66