Finding the Third Proportional to 90,131 and 208,648

Step by Step Solution

1. Step 1: Write the proportion equation
   90,131 : 208,648 = 208,648 : x
2. Step 2: Convert to fraction form
   90,131/208,648 = 208,648/x
3. Step 3: Cross multiply
   90,131x = 208,648 × 208,648
4. Step 4: Simplify right side
   90,131x = 43,533,987,904
5. Step 5: Solve for x
   x = 43,533,987,904/90,131
6. Step 6: Final answer
   x = 483,007.93