Finding the Third Proportional to 101,218.99 and 221,505.89

Step by Step Solution

1. Step 1: Write the proportion equation
   101,218.99 : 221,505.89 = 221,505.89 : x
2. Step 2: Convert to fraction form
   101,218.99/221,505.89 = 221,505.89/x
3. Step 3: Cross multiply
   101,218.99x = 221,505.89 × 221,505.89
4. Step 4: Simplify right side
   101,218.99x = 49,064,859,581.57
5. Step 5: Solve for x
   x = 49,064,859,581.57/101,218.99
6. Step 6: Final answer
   x = 484,739.66