Finding the Third Proportional to 310,425 and 681,814.50

Step by Step Solution

1. Step 1: Write the proportion equation
   310,425 : 681,814.50 = 681,814.50 : x
2. Step 2: Convert to fraction form
   310,425/681,814.50 = 681,814.50/x
3. Step 3: Cross multiply
   310,425x = 681,814.50 × 681,814.50
4. Step 4: Simplify right side
   310,425x = 464,871,012,410.25
5. Step 5: Solve for x
   x = 464,871,012,410.25/310,425
6. Step 6: Final answer
   x = 1,497,530.84