Finding the Third Proportional to 271,590 and 399,061

Step by Step Solution

1. Step 1: Write the proportion equation
   271,590 : 399,061 = 399,061 : x
2. Step 2: Convert to fraction form
   271,590/399,061 = 399,061/x
3. Step 3: Cross multiply
   271,590x = 399,061 × 399,061
4. Step 4: Simplify right side
   271,590x = 159,249,681,721
5. Step 5: Solve for x
   x = 159,249,681,721/271,590
6. Step 6: Final answer
   x = 586,360.62