Finding the Third Proportional to 104,142 and 215,669

Step by Step Solution

1. Step 1: Write the proportion equation
   104,142 : 215,669 = 215,669 : x
2. Step 2: Convert to fraction form
   104,142/215,669 = 215,669/x
3. Step 3: Cross multiply
   104,142x = 215,669 × 215,669
4. Step 4: Simplify right side
   104,142x = 46,513,117,561
5. Step 5: Solve for x
   x = 46,513,117,561/104,142
6. Step 6: Final answer
   x = 446,631.69