Finding the Third Proportional to 200,259.88 and 300,429.69

Step by Step Solution

1. Step 1: Write the proportion equation
   200,259.88 : 300,429.69 = 300,429.69 : x
2. Step 2: Convert to fraction form
   200,259.88/300,429.69 = 300,429.69/x
3. Step 3: Cross multiply
   200,259.88x = 300,429.69 × 300,429.69
4. Step 4: Simplify right side
   200,259.88x = 90,257,997,131.35
5. Step 5: Solve for x
   x = 90,257,997,131.35/200,259.88
6. Step 6: Final answer
   x = 450,704.35