Finding the Third Proportional to 348,583.50 and 490,860

Step by Step Solution

1. Step 1: Write the proportion equation
   348,583.50 : 490,860 = 490,860 : x
2. Step 2: Convert to fraction form
   348,583.50/490,860 = 490,860/x
3. Step 3: Cross multiply
   348,583.50x = 490,860 × 490,860
4. Step 4: Simplify right side
   348,583.50x = 240,943,539,600
5. Step 5: Solve for x
   x = 240,943,539,600/348,583.50
6. Step 6: Final answer
   x = 691,207.53