Finding the Third Proportional to 129,620.25 and 199,962

Step by Step Solution

1. Step 1: Write the proportion equation
   129,620.25 : 199,962 = 199,962 : x
2. Step 2: Convert to fraction form
   129,620.25/199,962 = 199,962/x
3. Step 3: Cross multiply
   129,620.25x = 199,962 × 199,962
4. Step 4: Simplify right side
   129,620.25x = 39,984,801,444
5. Step 5: Solve for x
   x = 39,984,801,444/129,620.25
6. Step 6: Final answer
   x = 308,476.50