Finding the Third Proportional to 438,850.50 and 655,404

Step by Step Solution

1. Step 1: Write the proportion equation
   438,850.50 : 655,404 = 655,404 : x
2. Step 2: Convert to fraction form
   438,850.50/655,404 = 655,404/x
3. Step 3: Cross multiply
   438,850.50x = 655,404 × 655,404
4. Step 4: Simplify right side
   438,850.50x = 429,554,403,216
5. Step 5: Solve for x
   x = 429,554,403,216/438,850.50
6. Step 6: Final answer
   x = 978,817.17