Finding the Third Proportional to 243,387 and 363,055.50

Step by Step Solution

1. Step 1: Write the proportion equation
   243,387 : 363,055.50 = 363,055.50 : x
2. Step 2: Convert to fraction form
   243,387/363,055.50 = 363,055.50/x
3. Step 3: Cross multiply
   243,387x = 363,055.50 × 363,055.50
4. Step 4: Simplify right side
   243,387x = 131,809,296,080.25
5. Step 5: Solve for x
   x = 131,809,296,080.25/243,387
6. Step 6: Final answer
   x = 541,562.60