Finding the Third Proportional to 139,599 and 290,997

Step by Step Solution

1. Step 1: Write the proportion equation
   139,599 : 290,997 = 290,997 : x
2. Step 2: Convert to fraction form
   139,599/290,997 = 290,997/x
3. Step 3: Cross multiply
   139,599x = 290,997 × 290,997
4. Step 4: Simplify right side
   139,599x = 84,679,254,009
5. Step 5: Solve for x
   x = 84,679,254,009/139,599
6. Step 6: Final answer
   x = 606,589.26