Finding the Third Proportional to 139,441 and 209,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,441 : 209,479.50 = 209,479.50 : x
2. Step 2: Convert to fraction form
   139,441/209,479.50 = 209,479.50/x
3. Step 3: Cross multiply
   139,441x = 209,479.50 × 209,479.50
4. Step 4: Simplify right side
   139,441x = 43,881,660,920.25
5. Step 5: Solve for x
   x = 43,881,660,920.25/139,441
6. Step 6: Final answer
   x = 314,696.98