Finding the Third Proportional to 139,078.69 and 209,266.03

Step by Step Solution

1. Step 1: Write the proportion equation
   139,078.69 : 209,266.03 = 209,266.03 : x
2. Step 2: Convert to fraction form
   139,078.69/209,266.03 = 209,266.03/x
3. Step 3: Cross multiply
   139,078.69x = 209,266.03 × 209,266.03
4. Step 4: Simplify right side
   139,078.69x = 43,792,271,835.13
5. Step 5: Solve for x
   x = 43,792,271,835.13/139,078.69
6. Step 6: Final answer
   x = 314,874.07