Finding the Third Proportional to 271,449 and 399,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   271,449 : 399,271.50 = 399,271.50 : x
2. Step 2: Convert to fraction form
   271,449/399,271.50 = 399,271.50/x
3. Step 3: Cross multiply
   271,449x = 399,271.50 × 399,271.50
4. Step 4: Simplify right side
   271,449x = 159,417,730,712.25
5. Step 5: Solve for x
   x = 159,417,730,712.25/271,449
6. Step 6: Final answer
   x = 587,284.28