Finding the Third Proportional to 139,303.50 and 209,268

Step by Step Solution

1. Step 1: Write the proportion equation
   139,303.50 : 209,268 = 209,268 : x
2. Step 2: Convert to fraction form
   139,303.50/209,268 = 209,268/x
3. Step 3: Cross multiply
   139,303.50x = 209,268 × 209,268
4. Step 4: Simplify right side
   139,303.50x = 43,793,095,824
5. Step 5: Solve for x
   x = 43,793,095,824/139,303.50
6. Step 6: Final answer
   x = 314,371.83