Finding the Third Proportional to 139,434 and 210,462

Step by Step Solution

1. Step 1: Write the proportion equation
   139,434 : 210,462 = 210,462 : x
2. Step 2: Convert to fraction form
   139,434/210,462 = 210,462/x
3. Step 3: Cross multiply
   139,434x = 210,462 × 210,462
4. Step 4: Simplify right side
   139,434x = 44,294,253,444
5. Step 5: Solve for x
   x = 44,294,253,444/139,434
6. Step 6: Final answer
   x = 317,671.83