Finding the Third Proportional to 342,620 and 522,020

Step by Step Solution

1. Step 1: Write the proportion equation
   342,620 : 522,020 = 522,020 : x
2. Step 2: Convert to fraction form
   342,620/522,020 = 522,020/x
3. Step 3: Cross multiply
   342,620x = 522,020 × 522,020
4. Step 4: Simplify right side
   342,620x = 272,504,880,400
5. Step 5: Solve for x
   x = 272,504,880,400/342,620
6. Step 6: Final answer
   x = 795,356.02