Finding the Third Proportional to 58,620.38 and 138,241.69

Step by Step Solution

1. Step 1: Write the proportion equation
   58,620.38 : 138,241.69 = 138,241.69 : x
2. Step 2: Convert to fraction form
   58,620.38/138,241.69 = 138,241.69/x
3. Step 3: Cross multiply
   58,620.38x = 138,241.69 × 138,241.69
4. Step 4: Simplify right side
   58,620.38x = 19,110,764,162.85
5. Step 5: Solve for x
   x = 19,110,764,162.85/58,620.38
6. Step 6: Final answer
   x = 326,008.90