Finding the Third Proportional to 408,024 and 612,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,024 : 612,391.50 = 612,391.50 : x
2. Step 2: Convert to fraction form
   408,024/612,391.50 = 612,391.50/x
3. Step 3: Cross multiply
   408,024x = 612,391.50 × 612,391.50
4. Step 4: Simplify right side
   408,024x = 375,023,349,272.25
5. Step 5: Solve for x
   x = 375,023,349,272.25/408,024
6. Step 6: Final answer
   x = 919,120.81