Finding the Third Proportional to 251,518.50 and 379,638

Step by Step Solution

1. Step 1: Write the proportion equation
   251,518.50 : 379,638 = 379,638 : x
2. Step 2: Convert to fraction form
   251,518.50/379,638 = 379,638/x
3. Step 3: Cross multiply
   251,518.50x = 379,638 × 379,638
4. Step 4: Simplify right side
   251,518.50x = 144,125,011,044
5. Step 5: Solve for x
   x = 144,125,011,044/251,518.50
6. Step 6: Final answer
   x = 573,019.52