Finding the Third Proportional to 138,173 and 213,365.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,173 : 213,365.50 = 213,365.50 : x
2. Step 2: Convert to fraction form
   138,173/213,365.50 = 213,365.50/x
3. Step 3: Cross multiply
   138,173x = 213,365.50 × 213,365.50
4. Step 4: Simplify right side
   138,173x = 45,524,836,590.25
5. Step 5: Solve for x
   x = 45,524,836,590.25/138,173
6. Step 6: Final answer
   x = 329,477.08