Finding the Third Proportional to 250,280.69 and 387,422.56

Step by Step Solution

1. Step 1: Write the proportion equation
   250,280.69 : 387,422.56 = 387,422.56 : x
2. Step 2: Convert to fraction form
   250,280.69/387,422.56 = 387,422.56/x
3. Step 3: Cross multiply
   250,280.69x = 387,422.56 × 387,422.56
4. Step 4: Simplify right side
   250,280.69x = 150,096,243,825.79
5. Step 5: Solve for x
   x = 150,096,243,825.79/250,280.69
6. Step 6: Final answer
   x = 599,711.65