Finding the Third Proportional to 351,478 and 756,355.50

Step by Step Solution

1. Step 1: Write the proportion equation
   351,478 : 756,355.50 = 756,355.50 : x
2. Step 2: Convert to fraction form
   351,478/756,355.50 = 756,355.50/x
3. Step 3: Cross multiply
   351,478x = 756,355.50 × 756,355.50
4. Step 4: Simplify right side
   351,478x = 572,073,642,380.25
5. Step 5: Solve for x
   x = 572,073,642,380.25/351,478
6. Step 6: Final answer
   x = 1,627,622.90