Finding the Third Proportional to 345,777 and 708,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   345,777 : 708,685.50 = 708,685.50 : x
2. Step 2: Convert to fraction form
   345,777/708,685.50 = 708,685.50/x
3. Step 3: Cross multiply
   345,777x = 708,685.50 × 708,685.50
4. Step 4: Simplify right side
   345,777x = 502,235,137,910.25
5. Step 5: Solve for x
   x = 502,235,137,910.25/345,777
6. Step 6: Final answer
   x = 1,452,482.78