Finding the Third Proportional to 139,456.50 and 210,494.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,456.50 : 210,494.25 = 210,494.25 : x
2. Step 2: Convert to fraction form
   139,456.50/210,494.25 = 210,494.25/x
3. Step 3: Cross multiply
   139,456.50x = 210,494.25 × 210,494.25
4. Step 4: Simplify right side
   139,456.50x = 44,307,829,283.06
5. Step 5: Solve for x
   x = 44,307,829,283.06/139,456.50
6. Step 6: Final answer
   x = 317,717.92