Finding the Third Proportional to 139,751 and 217,928

Step by Step Solution

1. Step 1: Write the proportion equation
   139,751 : 217,928 = 217,928 : x
2. Step 2: Convert to fraction form
   139,751/217,928 = 217,928/x
3. Step 3: Cross multiply
   139,751x = 217,928 × 217,928
4. Step 4: Simplify right side
   139,751x = 47,492,613,184
5. Step 5: Solve for x
   x = 47,492,613,184/139,751
6. Step 6: Final answer
   x = 339,837.38