Finding the Third Proportional to 138,159 and 213,343.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,159 : 213,343.50 = 213,343.50 : x
2. Step 2: Convert to fraction form
   138,159/213,343.50 = 213,343.50/x
3. Step 3: Cross multiply
   138,159x = 213,343.50 × 213,343.50
4. Step 4: Simplify right side
   138,159x = 45,515,448,992.25
5. Step 5: Solve for x
   x = 45,515,448,992.25/138,159
6. Step 6: Final answer
   x = 329,442.52