Finding the Third Proportional to 136,722 and 213,987.75

Step by Step Solution

1. Step 1: Write the proportion equation
   136,722 : 213,987.75 = 213,987.75 : x
2. Step 2: Convert to fraction form
   136,722/213,987.75 = 213,987.75/x
3. Step 3: Cross multiply
   136,722x = 213,987.75 × 213,987.75
4. Step 4: Simplify right side
   136,722x = 45,790,757,150.06
5. Step 5: Solve for x
   x = 45,790,757,150.06/136,722
6. Step 6: Final answer
   x = 334,918.72