Finding the Third Proportional to 210,844.69 and 300,494.81

Step by Step Solution

1. Step 1: Write the proportion equation
   210,844.69 : 300,494.81 = 300,494.81 : x
2. Step 2: Convert to fraction form
   210,844.69/300,494.81 = 300,494.81/x
3. Step 3: Cross multiply
   210,844.69x = 300,494.81 × 300,494.81
4. Step 4: Simplify right side
   210,844.69x = 90,297,132,339.41
5. Step 5: Solve for x
   x = 90,297,132,339.41/210,844.69
6. Step 6: Final answer
   x = 428,263.73