Finding the Third Proportional to 140,974 and 218,619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,974 : 218,619.50 = 218,619.50 : x
2. Step 2: Convert to fraction form
   140,974/218,619.50 = 218,619.50/x
3. Step 3: Cross multiply
   140,974x = 218,619.50 × 218,619.50
4. Step 4: Simplify right side
   140,974x = 47,794,485,780.25
5. Step 5: Solve for x
   x = 47,794,485,780.25/140,974
6. Step 6: Final answer
   x = 339,030.50