Finding the Third Proportional to 301,468.50 and 646,645.50

Step by Step Solution

1. Step 1: Write the proportion equation
   301,468.50 : 646,645.50 = 646,645.50 : x
2. Step 2: Convert to fraction form
   301,468.50/646,645.50 = 646,645.50/x
3. Step 3: Cross multiply
   301,468.50x = 646,645.50 × 646,645.50
4. Step 4: Simplify right side
   301,468.50x = 418,150,402,670.25
5. Step 5: Solve for x
   x = 418,150,402,670.25/301,468.50
6. Step 6: Final answer
   x = 1,387,045.09