Finding the Third Proportional to 243,198 and 363,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   243,198 : 363,820.50 = 363,820.50 : x
2. Step 2: Convert to fraction form
   243,198/363,820.50 = 363,820.50/x
3. Step 3: Cross multiply
   243,198x = 363,820.50 × 363,820.50
4. Step 4: Simplify right side
   243,198x = 132,365,356,220.25
5. Step 5: Solve for x
   x = 132,365,356,220.25/243,198
6. Step 6: Final answer
   x = 544,269.92