Finding the Third Proportional to 329,651 and 676,777.50

Step by Step Solution

1. Step 1: Write the proportion equation
   329,651 : 676,777.50 = 676,777.50 : x
2. Step 2: Convert to fraction form
   329,651/676,777.50 = 676,777.50/x
3. Step 3: Cross multiply
   329,651x = 676,777.50 × 676,777.50
4. Step 4: Simplify right side
   329,651x = 458,027,784,506.25
5. Step 5: Solve for x
   x = 458,027,784,506.25/329,651
6. Step 6: Final answer
   x = 1,389,432.41