Finding the Fourth Proportional to 12,647.16, 18,968.56 and 3,411

Step by Step Solution

1. Step 1: Write the proportion equation
   12,647.16 : 18,968.56 = 3,411 : x
2. Step 2: Convert to fraction form
   12,647.16/18,968.56 = 3,411/x
3. Step 3: Cross multiply
   12,647.16x = 18,968.56 × 3,411
4. Step 4: Simplify right side
   12,647.16x = 64,701,758.16
5. Step 5: Solve for x
   x = 64,701,758.16/12,647.16
6. Step 6: Final answer
   x = 5,115.91