Finding the Third Proportional to 216,048 and 338,144

Step by Step Solution

1. Step 1: Write the proportion equation
   216,048 : 338,144 = 338,144 : x
2. Step 2: Convert to fraction form
   216,048/338,144 = 338,144/x
3. Step 3: Cross multiply
   216,048x = 338,144 × 338,144
4. Step 4: Simplify right side
   216,048x = 114,341,364,736
5. Step 5: Solve for x
   x = 114,341,364,736/216,048
6. Step 6: Final answer
   x = 529,240.56