Finding the Third Proportional to 129,898.69 and 199,404.28

Step by Step Solution

1. Step 1: Write the proportion equation
   129,898.69 : 199,404.28 = 199,404.28 : x
2. Step 2: Convert to fraction form
   129,898.69/199,404.28 = 199,404.28/x
3. Step 3: Cross multiply
   129,898.69x = 199,404.28 × 199,404.28
4. Step 4: Simplify right side
   129,898.69x = 39,762,067,380.83
5. Step 5: Solve for x
   x = 39,762,067,380.83/129,898.69
6. Step 6: Final answer
   x = 306,100.61