Finding the Third Proportional to 428,871.50 and 630,831.50

Step by Step Solution

1. Step 1: Write the proportion equation
   428,871.50 : 630,831.50 = 630,831.50 : x
2. Step 2: Convert to fraction form
   428,871.50/630,831.50 = 630,831.50/x
3. Step 3: Cross multiply
   428,871.50x = 630,831.50 × 630,831.50
4. Step 4: Simplify right side
   428,871.50x = 397,948,381,392.25
5. Step 5: Solve for x
   x = 397,948,381,392.25/428,871.50
6. Step 6: Final answer
   x = 927,896.54