Finding the Third Proportional to 99,012 and 206,184

Step by Step Solution

1. Step 1: Write the proportion equation
   99,012 : 206,184 = 206,184 : x
2. Step 2: Convert to fraction form
   99,012/206,184 = 206,184/x
3. Step 3: Cross multiply
   99,012x = 206,184 × 206,184
4. Step 4: Simplify right side
   99,012x = 42,511,841,856
5. Step 5: Solve for x
   x = 42,511,841,856/99,012
6. Step 6: Final answer
   x = 429,360.50