Finding the Third Proportional to 139,450 and 287,154

Step by Step Solution

1. Step 1: Write the proportion equation
   139,450 : 287,154 = 287,154 : x
2. Step 2: Convert to fraction form
   139,450/287,154 = 287,154/x
3. Step 3: Cross multiply
   139,450x = 287,154 × 287,154
4. Step 4: Simplify right side
   139,450x = 82,457,419,716
5. Step 5: Solve for x
   x = 82,457,419,716/139,450
6. Step 6: Final answer
   x = 591,304.55