Finding the Third Proportional to 298,629 and 647,069.50

Step by Step Solution

1. Step 1: Write the proportion equation
   298,629 : 647,069.50 = 647,069.50 : x
2. Step 2: Convert to fraction form
   298,629/647,069.50 = 647,069.50/x
3. Step 3: Cross multiply
   298,629x = 647,069.50 × 647,069.50
4. Step 4: Simplify right side
   298,629x = 418,698,937,830.25
5. Step 5: Solve for x
   x = 418,698,937,830.25/298,629
6. Step 6: Final answer
   x = 1,402,070.59