Finding the Third Proportional to 222,105 and 316,545

Step by Step Solution

1. Step 1: Write the proportion equation
   222,105 : 316,545 = 316,545 : x
2. Step 2: Convert to fraction form
   222,105/316,545 = 316,545/x
3. Step 3: Cross multiply
   222,105x = 316,545 × 316,545
4. Step 4: Simplify right side
   222,105x = 100,200,737,025
5. Step 5: Solve for x
   x = 100,200,737,025/222,105
6. Step 6: Final answer
   x = 451,141.29