Finding the Third Proportional to 326,007 and 518,710.50

Step by Step Solution

1. Step 1: Write the proportion equation
   326,007 : 518,710.50 = 518,710.50 : x
2. Step 2: Convert to fraction form
   326,007/518,710.50 = 518,710.50/x
3. Step 3: Cross multiply
   326,007x = 518,710.50 × 518,710.50
4. Step 4: Simplify right side
   326,007x = 269,060,582,810.25
5. Step 5: Solve for x
   x = 269,060,582,810.25/326,007
6. Step 6: Final answer
   x = 825,321.49