Finding the Third Proportional to 231,408 and 349,580.25

Step by Step Solution

1. Step 1: Write the proportion equation
   231,408 : 349,580.25 = 349,580.25 : x
2. Step 2: Convert to fraction form
   231,408/349,580.25 = 349,580.25/x
3. Step 3: Cross multiply
   231,408x = 349,580.25 × 349,580.25
4. Step 4: Simplify right side
   231,408x = 122,206,351,190.06
5. Step 5: Solve for x
   x = 122,206,351,190.06/231,408
6. Step 6: Final answer
   x = 528,099.08