Finding the Third Proportional to 90,036 and 208,440

Step by Step Solution

1. Step 1: Write the proportion equation
   90,036 : 208,440 = 208,440 : x
2. Step 2: Convert to fraction form
   90,036/208,440 = 208,440/x
3. Step 3: Cross multiply
   90,036x = 208,440 × 208,440
4. Step 4: Simplify right side
   90,036x = 43,447,233,600
5. Step 5: Solve for x
   x = 43,447,233,600/90,036
6. Step 6: Final answer
   x = 482,554.02