Finding the Third Proportional to 351,039 and 501,619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   351,039 : 501,619.50 = 501,619.50 : x
2. Step 2: Convert to fraction form
   351,039/501,619.50 = 501,619.50/x
3. Step 3: Cross multiply
   351,039x = 501,619.50 × 501,619.50
4. Step 4: Simplify right side
   351,039x = 251,622,122,780.25
5. Step 5: Solve for x
   x = 251,622,122,780.25/351,039
6. Step 6: Final answer
   x = 716,792.50