Finding the Third Proportional to 90,012 and 208,386

Step by Step Solution

1. Step 1: Write the proportion equation
   90,012 : 208,386 = 208,386 : x
2. Step 2: Convert to fraction form
   90,012/208,386 = 208,386/x
3. Step 3: Cross multiply
   90,012x = 208,386 × 208,386
4. Step 4: Simplify right side
   90,012x = 43,424,724,996
5. Step 5: Solve for x
   x = 43,424,724,996/90,012
6. Step 6: Final answer
   x = 482,432.62