Finding the Third Proportional to 90,058 and 208,486

Step by Step Solution

1. Step 1: Write the proportion equation
   90,058 : 208,486 = 208,486 : x
2. Step 2: Convert to fraction form
   90,058/208,486 = 208,486/x
3. Step 3: Cross multiply
   90,058x = 208,486 × 208,486
4. Step 4: Simplify right side
   90,058x = 43,466,412,196
5. Step 5: Solve for x
   x = 43,466,412,196/90,058
6. Step 6: Final answer
   x = 482,649.09