Finding the Third Proportional to 250,407 and 387,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   250,407 : 387,760.50 = 387,760.50 : x
2. Step 2: Convert to fraction form
   250,407/387,760.50 = 387,760.50/x
3. Step 3: Cross multiply
   250,407x = 387,760.50 × 387,760.50
4. Step 4: Simplify right side
   250,407x = 150,358,205,360.25
5. Step 5: Solve for x
   x = 150,358,205,360.25/250,407
6. Step 6: Final answer
   x = 600,455.28