Finding the Third Proportional to 139,024 and 214,328

Step by Step Solution

1. Step 1: Write the proportion equation
   139,024 : 214,328 = 214,328 : x
2. Step 2: Convert to fraction form
   139,024/214,328 = 214,328/x
3. Step 3: Cross multiply
   139,024x = 214,328 × 214,328
4. Step 4: Simplify right side
   139,024x = 45,936,491,584
5. Step 5: Solve for x
   x = 45,936,491,584/139,024
6. Step 6: Final answer
   x = 330,421.31