Finding the Third Proportional to 315,127.50 and 459,150

Step by Step Solution

1. Step 1: Write the proportion equation
   315,127.50 : 459,150 = 459,150 : x
2. Step 2: Convert to fraction form
   315,127.50/459,150 = 459,150/x
3. Step 3: Cross multiply
   315,127.50x = 459,150 × 459,150
4. Step 4: Simplify right side
   315,127.50x = 210,818,722,500
5. Step 5: Solve for x
   x = 210,818,722,500/315,127.50
6. Step 6: Final answer
   x = 668,995.00