Finding the Third Proportional to 348,438 and 490,693.50

Step by Step Solution

1. Step 1: Write the proportion equation
   348,438 : 490,693.50 = 490,693.50 : x
2. Step 2: Convert to fraction form
   348,438/490,693.50 = 490,693.50/x
3. Step 3: Cross multiply
   348,438x = 490,693.50 × 490,693.50
4. Step 4: Simplify right side
   348,438x = 240,780,110,942.25
5. Step 5: Solve for x
   x = 240,780,110,942.25/348,438
6. Step 6: Final answer
   x = 691,027.13