Finding the Fourth Proportional to 8,443.56, 12,655.68 and 5,149.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,443.56 : 12,655.68 = 5,149.34 : x
2. Step 2: Convert to fraction form
   8,443.56/12,655.68 = 5,149.34/x
3. Step 3: Cross multiply
   8,443.56x = 12,655.68 × 5,149.34
4. Step 4: Simplify right side
   8,443.56x = 65,168,399.25
5. Step 5: Solve for x
   x = 65,168,399.25/8,443.56
6. Step 6: Final answer
   x = 7,718.12