Finding the Third Proportional to 201,144.50 and 397,155

Step by Step Solution

1. Step 1: Write the proportion equation
   201,144.50 : 397,155 = 397,155 : x
2. Step 2: Convert to fraction form
   201,144.50/397,155 = 397,155/x
3. Step 3: Cross multiply
   201,144.50x = 397,155 × 397,155
4. Step 4: Simplify right side
   201,144.50x = 157,732,094,025
5. Step 5: Solve for x
   x = 157,732,094,025/201,144.50
6. Step 6: Final answer
   x = 784,173.04