Finding the Third Proportional to 138,145.50 and 247,860

Step by Step Solution

1. Step 1: Write the proportion equation
   138,145.50 : 247,860 = 247,860 : x
2. Step 2: Convert to fraction form
   138,145.50/247,860 = 247,860/x
3. Step 3: Cross multiply
   138,145.50x = 247,860 × 247,860
4. Step 4: Simplify right side
   138,145.50x = 61,434,579,600
5. Step 5: Solve for x
   x = 61,434,579,600/138,145.50
6. Step 6: Final answer
   x = 444,709.23