Finding the Third Proportional to 139,552 and 290,912

Step by Step Solution

1. Step 1: Write the proportion equation
   139,552 : 290,912 = 290,912 : x
2. Step 2: Convert to fraction form
   139,552/290,912 = 290,912/x
3. Step 3: Cross multiply
   139,552x = 290,912 × 290,912
4. Step 4: Simplify right side
   139,552x = 84,629,791,744
5. Step 5: Solve for x
   x = 84,629,791,744/139,552
6. Step 6: Final answer
   x = 606,439.12