Finding the Third Proportional to 139,232 and 208,240

Step by Step Solution

1. Step 1: Write the proportion equation
   139,232 : 208,240 = 208,240 : x
2. Step 2: Convert to fraction form
   139,232/208,240 = 208,240/x
3. Step 3: Cross multiply
   139,232x = 208,240 × 208,240
4. Step 4: Simplify right side
   139,232x = 43,363,897,600
5. Step 5: Solve for x
   x = 43,363,897,600/139,232
6. Step 6: Final answer
   x = 311,450.66