Finding the Third Proportional to 139,544 and 290,896

Step by Step Solution

1. Step 1: Write the proportion equation
   139,544 : 290,896 = 290,896 : x
2. Step 2: Convert to fraction form
   139,544/290,896 = 290,896/x
3. Step 3: Cross multiply
   139,544x = 290,896 × 290,896
4. Step 4: Simplify right side
   139,544x = 84,620,482,816
5. Step 5: Solve for x
   x = 84,620,482,816/139,544
6. Step 6: Final answer
   x = 606,407.17