Finding the Third Proportional to 254,428.50 and 336,408

Step by Step Solution

1. Step 1: Write the proportion equation
   254,428.50 : 336,408 = 336,408 : x
2. Step 2: Convert to fraction form
   254,428.50/336,408 = 336,408/x
3. Step 3: Cross multiply
   254,428.50x = 336,408 × 336,408
4. Step 4: Simplify right side
   254,428.50x = 113,170,342,464
5. Step 5: Solve for x
   x = 113,170,342,464/254,428.50
6. Step 6: Final answer
   x = 444,802.14