Finding the Third Proportional to 298,624.50 and 647,061.75

Step by Step Solution

1. Step 1: Write the proportion equation
   298,624.50 : 647,061.75 = 647,061.75 : x
2. Step 2: Convert to fraction form
   298,624.50/647,061.75 = 647,061.75/x
3. Step 3: Cross multiply
   298,624.50x = 647,061.75 × 647,061.75
4. Step 4: Simplify right side
   298,624.50x = 418,688,908,313.06
5. Step 5: Solve for x
   x = 418,688,908,313.06/298,624.50
6. Step 6: Final answer
   x = 1,402,058.13