Finding the Third Proportional to 271,872 and 399,480.75

Step by Step Solution

1. Step 1: Write the proportion equation
   271,872 : 399,480.75 = 399,480.75 : x
2. Step 2: Convert to fraction form
   271,872/399,480.75 = 399,480.75/x
3. Step 3: Cross multiply
   271,872x = 399,480.75 × 399,480.75
4. Step 4: Simplify right side
   271,872x = 159,584,869,620.56
5. Step 5: Solve for x
   x = 159,584,869,620.56/271,872
6. Step 6: Final answer
   x = 586,985.31