Finding the Third Proportional to 310,903.50 and 664,464

Step by Step Solution

1. Step 1: Write the proportion equation
   310,903.50 : 664,464 = 664,464 : x
2. Step 2: Convert to fraction form
   310,903.50/664,464 = 664,464/x
3. Step 3: Cross multiply
   310,903.50x = 664,464 × 664,464
4. Step 4: Simplify right side
   310,903.50x = 441,512,407,296
5. Step 5: Solve for x
   x = 441,512,407,296/310,903.50
6. Step 6: Final answer
   x = 1,420,094.68