Finding the Third Proportional to 644,554 and 1,417,988

Step by Step Solution

1. Step 1: Write the proportion equation
   644,554 : 1,417,988 = 1,417,988 : x
2. Step 2: Convert to fraction form
   644,554/1,417,988 = 1,417,988/x
3. Step 3: Cross multiply
   644,554x = 1,417,988 × 1,417,988
4. Step 4: Simplify right side
   644,554x = 2,010,689,968,144
5. Step 5: Solve for x
   x = 2,010,689,968,144/644,554
6. Step 6: Final answer
   x = 3,119,505.84