Finding the Third Proportional to 138,134.50 and 213,304

Step by Step Solution

1. Step 1: Write the proportion equation
   138,134.50 : 213,304 = 213,304 : x
2. Step 2: Convert to fraction form
   138,134.50/213,304 = 213,304/x
3. Step 3: Cross multiply
   138,134.50x = 213,304 × 213,304
4. Step 4: Simplify right side
   138,134.50x = 45,498,596,416
5. Step 5: Solve for x
   x = 45,498,596,416/138,134.50
6. Step 6: Final answer
   x = 329,378.95