Finding the Third Proportional to 271,302 and 399,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   271,302 : 399,109.50 = 399,109.50 : x
2. Step 2: Convert to fraction form
   271,302/399,109.50 = 399,109.50/x
3. Step 3: Cross multiply
   271,302x = 399,109.50 × 399,109.50
4. Step 4: Simplify right side
   271,302x = 159,288,392,990.25
5. Step 5: Solve for x
   x = 159,288,392,990.25/271,302
6. Step 6: Final answer
   x = 587,125.76