Finding the Third Proportional to 620,144 and 1,339,432

Step by Step Solution

1. Step 1: Write the proportion equation
   620,144 : 1,339,432 = 1,339,432 : x
2. Step 2: Convert to fraction form
   620,144/1,339,432 = 1,339,432/x
3. Step 3: Cross multiply
   620,144x = 1,339,432 × 1,339,432
4. Step 4: Simplify right side
   620,144x = 1,794,078,082,624
5. Step 5: Solve for x
   x = 1,794,078,082,624/620,144
6. Step 6: Final answer
   x = 2,893,002.40