Finding the Third Proportional to 221,105.81 and 350,676

Step by Step Solution

1. Step 1: Write the proportion equation
   221,105.81 : 350,676 = 350,676 : x
2. Step 2: Convert to fraction form
   221,105.81/350,676 = 350,676/x
3. Step 3: Cross multiply
   221,105.81x = 350,676 × 350,676
4. Step 4: Simplify right side
   221,105.81x = 122,973,656,976
5. Step 5: Solve for x
   x = 122,973,656,976/221,105.81
6. Step 6: Final answer
   x = 556,175.60