Finding the Third Proportional to 136,588.50 and 206,787

Step by Step Solution

1. Step 1: Write the proportion equation
   136,588.50 : 206,787 = 206,787 : x
2. Step 2: Convert to fraction form
   136,588.50/206,787 = 206,787/x
3. Step 3: Cross multiply
   136,588.50x = 206,787 × 206,787
4. Step 4: Simplify right side
   136,588.50x = 42,760,863,369
5. Step 5: Solve for x
   x = 42,760,863,369/136,588.50
6. Step 6: Final answer
   x = 313,063.42