Finding the Third Proportional to 214,431.50 and 315,410

Step by Step Solution

1. Step 1: Write the proportion equation
   214,431.50 : 315,410 = 315,410 : x
2. Step 2: Convert to fraction form
   214,431.50/315,410 = 315,410/x
3. Step 3: Cross multiply
   214,431.50x = 315,410 × 315,410
4. Step 4: Simplify right side
   214,431.50x = 99,483,468,100
5. Step 5: Solve for x
   x = 99,483,468,100/214,431.50
6. Step 6: Final answer
   x = 463,940.55