Finding the Third Proportional to 99,024 and 216,111

Step by Step Solution

1. Step 1: Write the proportion equation
   99,024 : 216,111 = 216,111 : x
2. Step 2: Convert to fraction form
   99,024/216,111 = 216,111/x
3. Step 3: Cross multiply
   99,024x = 216,111 × 216,111
4. Step 4: Simplify right side
   99,024x = 46,703,964,321
5. Step 5: Solve for x
   x = 46,703,964,321/99,024
6. Step 6: Final answer
   x = 471,642.88