Finding the Third Proportional to 243,698 and 363,518.50

Step by Step Solution

1. Step 1: Write the proportion equation
   243,698 : 363,518.50 = 363,518.50 : x
2. Step 2: Convert to fraction form
   243,698/363,518.50 = 363,518.50/x
3. Step 3: Cross multiply
   243,698x = 363,518.50 × 363,518.50
4. Step 4: Simplify right side
   243,698x = 132,145,699,842.25
5. Step 5: Solve for x
   x = 132,145,699,842.25/243,698
6. Step 6: Final answer
   x = 542,251.88