Finding the Third Proportional to 155,206.50 and 243,630

Step by Step Solution

1. Step 1: Write the proportion equation
   155,206.50 : 243,630 = 243,630 : x
2. Step 2: Convert to fraction form
   155,206.50/243,630 = 243,630/x
3. Step 3: Cross multiply
   155,206.50x = 243,630 × 243,630
4. Step 4: Simplify right side
   155,206.50x = 59,355,576,900
5. Step 5: Solve for x
   x = 59,355,576,900/155,206.50
6. Step 6: Final answer
   x = 382,429.71