Finding the Third Proportional to 553,746 and 815,061

Step by Step Solution

1. Step 1: Write the proportion equation
   553,746 : 815,061 = 815,061 : x
2. Step 2: Convert to fraction form
   553,746/815,061 = 815,061/x
3. Step 3: Cross multiply
   553,746x = 815,061 × 815,061
4. Step 4: Simplify right side
   553,746x = 664,324,433,721
5. Step 5: Solve for x
   x = 664,324,433,721/553,746
6. Step 6: Final answer
   x = 1,199,691.62