Finding the Third Proportional to 354,436 and 777,765.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,436 : 777,765.50 = 777,765.50 : x
2. Step 2: Convert to fraction form
   354,436/777,765.50 = 777,765.50/x
3. Step 3: Cross multiply
   354,436x = 777,765.50 × 777,765.50
4. Step 4: Simplify right side
   354,436x = 604,919,172,990.25
5. Step 5: Solve for x
   x = 604,919,172,990.25/354,436
6. Step 6: Final answer
   x = 1,706,709.17