Finding the Third Proportional to 136,241 and 212,639.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,241 : 212,639.50 = 212,639.50 : x
2. Step 2: Convert to fraction form
   136,241/212,639.50 = 212,639.50/x
3. Step 3: Cross multiply
   136,241x = 212,639.50 × 212,639.50
4. Step 4: Simplify right side
   136,241x = 45,215,556,960.25
5. Step 5: Solve for x
   x = 45,215,556,960.25/136,241
6. Step 6: Final answer
   x = 331,879.22