Finding the Third Proportional to 149,816.81 and 321,867.56

Step by Step Solution

1. Step 1: Write the proportion equation
   149,816.81 : 321,867.56 = 321,867.56 : x
2. Step 2: Convert to fraction form
   149,816.81/321,867.56 = 321,867.56/x
3. Step 3: Cross multiply
   149,816.81x = 321,867.56 × 321,867.56
4. Step 4: Simplify right side
   149,816.81x = 103,598,727,789.69
5. Step 5: Solve for x
   x = 103,598,727,789.69/149,816.81
6. Step 6: Final answer
   x = 691,502.68