Finding the Third Proportional to 268,731 and 388,471.50

Step by Step Solution

1. Step 1: Write the proportion equation
   268,731 : 388,471.50 = 388,471.50 : x
2. Step 2: Convert to fraction form
   268,731/388,471.50 = 388,471.50/x
3. Step 3: Cross multiply
   268,731x = 388,471.50 × 388,471.50
4. Step 4: Simplify right side
   268,731x = 150,910,106,312.25
5. Step 5: Solve for x
   x = 150,910,106,312.25/268,731
6. Step 6: Final answer
   x = 561,565.68