Finding the Third Proportional to 258,081 and 607,210.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,081 : 607,210.50 = 607,210.50 : x
2. Step 2: Convert to fraction form
   258,081/607,210.50 = 607,210.50/x
3. Step 3: Cross multiply
   258,081x = 607,210.50 × 607,210.50
4. Step 4: Simplify right side
   258,081x = 368,704,591,310.25
5. Step 5: Solve for x
   x = 368,704,591,310.25/258,081
6. Step 6: Final answer
   x = 1,428,639.04