Finding the Third Proportional to 408,018 and 612,382.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,018 : 612,382.50 = 612,382.50 : x
2. Step 2: Convert to fraction form
   408,018/612,382.50 = 612,382.50/x
3. Step 3: Cross multiply
   408,018x = 612,382.50 × 612,382.50
4. Step 4: Simplify right side
   408,018x = 375,012,326,306.25
5. Step 5: Solve for x
   x = 375,012,326,306.25/408,018
6. Step 6: Final answer
   x = 919,107.31