Finding the Third Proportional to 99,039 and 216,792

Step by Step Solution

1. Step 1: Write the proportion equation
   99,039 : 216,792 = 216,792 : x
2. Step 2: Convert to fraction form
   99,039/216,792 = 216,792/x
3. Step 3: Cross multiply
   99,039x = 216,792 × 216,792
4. Step 4: Simplify right side
   99,039x = 46,998,771,264
5. Step 5: Solve for x
   x = 46,998,771,264/99,039
6. Step 6: Final answer
   x = 474,548.12