Finding the Third Proportional to 443,830.50 and 628,009.50

Step by Step Solution

1. Step 1: Write the proportion equation
   443,830.50 : 628,009.50 = 628,009.50 : x
2. Step 2: Convert to fraction form
   443,830.50/628,009.50 = 628,009.50/x
3. Step 3: Cross multiply
   443,830.50x = 628,009.50 × 628,009.50
4. Step 4: Simplify right side
   443,830.50x = 394,395,932,090.25
5. Step 5: Solve for x
   x = 394,395,932,090.25/443,830.50
6. Step 6: Final answer
   x = 888,618.36