Finding the Third Proportional to 136,661.50 and 300,228.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,661.50 : 300,228.50 = 300,228.50 : x
2. Step 2: Convert to fraction form
   136,661.50/300,228.50 = 300,228.50/x
3. Step 3: Cross multiply
   136,661.50x = 300,228.50 × 300,228.50
4. Step 4: Simplify right side
   136,661.50x = 90,137,152,212.25
5. Step 5: Solve for x
   x = 90,137,152,212.25/136,661.50
6. Step 6: Final answer
   x = 659,565.07