Finding the Third Proportional to 301,413 and 644,264.25

Step by Step Solution

1. Step 1: Write the proportion equation
   301,413 : 644,264.25 = 644,264.25 : x
2. Step 2: Convert to fraction form
   301,413/644,264.25 = 644,264.25/x
3. Step 3: Cross multiply
   301,413x = 644,264.25 × 644,264.25
4. Step 4: Simplify right side
   301,413x = 415,076,423,828.06
5. Step 5: Solve for x
   x = 415,076,423,828.06/301,413
6. Step 6: Final answer
   x = 1,377,101.93