Finding the Third Proportional to 815,511 and 1,705,380

Step by Step Solution

1. Step 1: Write the proportion equation
   815,511 : 1,705,380 = 1,705,380 : x
2. Step 2: Convert to fraction form
   815,511/1,705,380 = 1,705,380/x
3. Step 3: Cross multiply
   815,511x = 1,705,380 × 1,705,380
4. Step 4: Simplify right side
   815,511x = 2,908,320,944,400
5. Step 5: Solve for x
   x = 2,908,320,944,400/815,511
6. Step 6: Final answer
   x = 3,566,255.94