Finding the Third Proportional to 243,182 and 388,486.50

Step by Step Solution

1. Step 1: Write the proportion equation
   243,182 : 388,486.50 = 388,486.50 : x
2. Step 2: Convert to fraction form
   243,182/388,486.50 = 388,486.50/x
3. Step 3: Cross multiply
   243,182x = 388,486.50 × 388,486.50
4. Step 4: Simplify right side
   243,182x = 150,921,760,682.25
5. Step 5: Solve for x
   x = 150,921,760,682.25/243,182
6. Step 6: Final answer
   x = 620,612.38