Finding the Third Proportional to 139,545 and 290,898

Step by Step Solution

1. Step 1: Write the proportion equation
   139,545 : 290,898 = 290,898 : x
2. Step 2: Convert to fraction form
   139,545/290,898 = 290,898/x
3. Step 3: Cross multiply
   139,545x = 290,898 × 290,898
4. Step 4: Simplify right side
   139,545x = 84,621,646,404
5. Step 5: Solve for x
   x = 84,621,646,404/139,545
6. Step 6: Final answer
   x = 606,411.17