Finding the Third Proportional to 621,116 and 1,337,336

Step by Step Solution

1. Step 1: Write the proportion equation
   621,116 : 1,337,336 = 1,337,336 : x
2. Step 2: Convert to fraction form
   621,116/1,337,336 = 1,337,336/x
3. Step 3: Cross multiply
   621,116x = 1,337,336 × 1,337,336
4. Step 4: Simplify right side
   621,116x = 1,788,467,576,896
5. Step 5: Solve for x
   x = 1,788,467,576,896/621,116
6. Step 6: Final answer
   x = 2,879,442.13