Finding the Fourth Proportional to 11,103.56, 16,647.78 and 4,172.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,103.56 : 16,647.78 = 4,172.12 : x
2. Step 2: Convert to fraction form
   11,103.56/16,647.78 = 4,172.12/x
3. Step 3: Cross multiply
   11,103.56x = 16,647.78 × 4,172.12
4. Step 4: Simplify right side
   11,103.56x = 69,456,535.89
5. Step 5: Solve for x
   x = 69,456,535.89/11,103.56
6. Step 6: Final answer
   x = 6,255.34