Finding the Third Proportional to 136,623 and 209,080.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,623 : 209,080.50 = 209,080.50 : x
2. Step 2: Convert to fraction form
   136,623/209,080.50 = 209,080.50/x
3. Step 3: Cross multiply
   136,623x = 209,080.50 × 209,080.50
4. Step 4: Simplify right side
   136,623x = 43,714,655,480.25
5. Step 5: Solve for x
   x = 43,714,655,480.25/136,623
6. Step 6: Final answer
   x = 319,965.57