Finding the Third Proportional to 139,308 and 209,274

Step by Step Solution

1. Step 1: Write the proportion equation
   139,308 : 209,274 = 209,274 : x
2. Step 2: Convert to fraction form
   139,308/209,274 = 209,274/x
3. Step 3: Cross multiply
   139,308x = 209,274 × 209,274
4. Step 4: Simplify right side
   139,308x = 43,795,607,076
5. Step 5: Solve for x
   x = 43,795,607,076/139,308
6. Step 6: Final answer
   x = 314,379.70