Finding the Third Proportional to 99,736 and 218,240

Step by Step Solution

1. Step 1: Write the proportion equation
   99,736 : 218,240 = 218,240 : x
2. Step 2: Convert to fraction form
   99,736/218,240 = 218,240/x
3. Step 3: Cross multiply
   99,736x = 218,240 × 218,240
4. Step 4: Simplify right side
   99,736x = 47,628,697,600
5. Step 5: Solve for x
   x = 47,628,697,600/99,736
6. Step 6: Final answer
   x = 477,547.70