Finding the Third Proportional to 258,012 and 607,078.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,012 : 607,078.50 = 607,078.50 : x
2. Step 2: Convert to fraction form
   258,012/607,078.50 = 607,078.50/x
3. Step 3: Cross multiply
   258,012x = 607,078.50 × 607,078.50
4. Step 4: Simplify right side
   258,012x = 368,544,305,162.25
5. Step 5: Solve for x
   x = 368,544,305,162.25/258,012
6. Step 6: Final answer
   x = 1,428,399.86