Finding the Third Proportional to 408,283 and 612,831.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,283 : 612,831.50 = 612,831.50 : x
2. Step 2: Convert to fraction form
   408,283/612,831.50 = 612,831.50/x
3. Step 3: Cross multiply
   408,283x = 612,831.50 × 612,831.50
4. Step 4: Simplify right side
   408,283x = 375,562,447,392.25
5. Step 5: Solve for x
   x = 375,562,447,392.25/408,283
6. Step 6: Final answer
   x = 919,858.16