Finding the Third Proportional to 354,435 and 777,763.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,435 : 777,763.50 = 777,763.50 : x
2. Step 2: Convert to fraction form
   354,435/777,763.50 = 777,763.50/x
3. Step 3: Cross multiply
   354,435x = 777,763.50 × 777,763.50
4. Step 4: Simplify right side
   354,435x = 604,916,061,932.25
5. Step 5: Solve for x
   x = 604,916,061,932.25/354,435
6. Step 6: Final answer
   x = 1,706,705.21