Finding the Third Proportional to 139,362 and 209,358

Step by Step Solution

1. Step 1: Write the proportion equation
   139,362 : 209,358 = 209,358 : x
2. Step 2: Convert to fraction form
   139,362/209,358 = 209,358/x
3. Step 3: Cross multiply
   139,362x = 209,358 × 209,358
4. Step 4: Simplify right side
   139,362x = 43,830,772,164
5. Step 5: Solve for x
   x = 43,830,772,164/139,362
6. Step 6: Final answer
   x = 314,510.21