Finding the Third Proportional to 89,984.81 and 196,918.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89,984.81 : 196,918.31 = 196,918.31 : x
2. Step 2: Convert to fraction form
   89,984.81/196,918.31 = 196,918.31/x
3. Step 3: Cross multiply
   89,984.81x = 196,918.31 × 196,918.31
4. Step 4: Simplify right side
   89,984.81x = 38,776,821,797.85
5. Step 5: Solve for x
   x = 38,776,821,797.85/89,984.81
6. Step 6: Final answer
   x = 430,926.29