Finding the Third Proportional to 239,819 and 518,061

Step by Step Solution

1. Step 1: Write the proportion equation
   239,819 : 518,061 = 518,061 : x
2. Step 2: Convert to fraction form
   239,819/518,061 = 518,061/x
3. Step 3: Cross multiply
   239,819x = 518,061 × 518,061
4. Step 4: Simplify right side
   239,819x = 268,387,199,721
5. Step 5: Solve for x
   x = 268,387,199,721/239,819
6. Step 6: Final answer
   x = 1,119,124.00