Finding the Third Proportional to 623,620 and 1,363,880

Step by Step Solution

1. Step 1: Write the proportion equation
   623,620 : 1,363,880 = 1,363,880 : x
2. Step 2: Convert to fraction form
   623,620/1,363,880 = 1,363,880/x
3. Step 3: Cross multiply
   623,620x = 1,363,880 × 1,363,880
4. Step 4: Simplify right side
   623,620x = 1,860,168,654,400
5. Step 5: Solve for x
   x = 1,860,168,654,400/623,620
6. Step 6: Final answer
   x = 2,982,855.99