Finding the Third Proportional to 546,817.50 and 820,215

Step by Step Solution

1. Step 1: Write the proportion equation
   546,817.50 : 820,215 = 820,215 : x
2. Step 2: Convert to fraction form
   546,817.50/820,215 = 820,215/x
3. Step 3: Cross multiply
   546,817.50x = 820,215 × 820,215
4. Step 4: Simplify right side
   546,817.50x = 672,752,646,225
5. Step 5: Solve for x
   x = 672,752,646,225/546,817.50
6. Step 6: Final answer
   x = 1,230,305.63