Finding the Third Proportional to 214,906.50 and 331,380

Step by Step Solution

1. Step 1: Write the proportion equation
   214,906.50 : 331,380 = 331,380 : x
2. Step 2: Convert to fraction form
   214,906.50/331,380 = 331,380/x
3. Step 3: Cross multiply
   214,906.50x = 331,380 × 331,380
4. Step 4: Simplify right side
   214,906.50x = 109,812,704,400
5. Step 5: Solve for x
   x = 109,812,704,400/214,906.50
6. Step 6: Final answer
   x = 510,978.98