Finding the Third Proportional to 621,498 and 1,353,705

Step by Step Solution

1. Step 1: Write the proportion equation
   621,498 : 1,353,705 = 1,353,705 : x
2. Step 2: Convert to fraction form
   621,498/1,353,705 = 1,353,705/x
3. Step 3: Cross multiply
   621,498x = 1,353,705 × 1,353,705
4. Step 4: Simplify right side
   621,498x = 1,832,517,227,025
5. Step 5: Solve for x
   x = 1,832,517,227,025/621,498
6. Step 6: Final answer
   x = 2,948,548.87