Finding the Third Proportional to 240,408 and 360,648

Step by Step Solution

1. Step 1: Write the proportion equation
   240,408 : 360,648 = 360,648 : x
2. Step 2: Convert to fraction form
   240,408/360,648 = 360,648/x
3. Step 3: Cross multiply
   240,408x = 360,648 × 360,648
4. Step 4: Simplify right side
   240,408x = 130,066,979,904
5. Step 5: Solve for x
   x = 130,066,979,904/240,408
6. Step 6: Final answer
   x = 541,026.01