Finding the Third Proportional to 243,391 and 363,061

Step by Step Solution

1. Step 1: Write the proportion equation
   243,391 : 363,061 = 363,061 : x
2. Step 2: Convert to fraction form
   243,391/363,061 = 363,061/x
3. Step 3: Cross multiply
   243,391x = 363,061 × 363,061
4. Step 4: Simplify right side
   243,391x = 131,813,289,721
5. Step 5: Solve for x
   x = 131,813,289,721/243,391
6. Step 6: Final answer
   x = 541,570.11