Finding the Fourth Proportional to 8,271.72, 12,410.82 and 3,078

Step by Step Solution

1. Step 1: Write the proportion equation
   8,271.72 : 12,410.82 = 3,078 : x
2. Step 2: Convert to fraction form
   8,271.72/12,410.82 = 3,078/x
3. Step 3: Cross multiply
   8,271.72x = 12,410.82 × 3,078
4. Step 4: Simplify right side
   8,271.72x = 38,200,503.96
5. Step 5: Solve for x
   x = 38,200,503.96/8,271.72
6. Step 6: Final answer
   x = 4,618.21