Finding the Third Proportional to 104,229 and 212,145

Step by Step Solution

1. Step 1: Write the proportion equation
   104,229 : 212,145 = 212,145 : x
2. Step 2: Convert to fraction form
   104,229/212,145 = 212,145/x
3. Step 3: Cross multiply
   104,229x = 212,145 × 212,145
4. Step 4: Simplify right side
   104,229x = 45,005,501,025
5. Step 5: Solve for x
   x = 45,005,501,025/104,229
6. Step 6: Final answer
   x = 431,794.42