Finding the Fourth Proportional to 12,410.76, 18,616.22 and 3,645.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,410.76 : 18,616.22 = 3,645.80 : x
2. Step 2: Convert to fraction form
   12,410.76/18,616.22 = 3,645.80/x
3. Step 3: Cross multiply
   12,410.76x = 18,616.22 × 3,645.80
4. Step 4: Simplify right side
   12,410.76x = 67,871,014.88
5. Step 5: Solve for x
   x = 67,871,014.88/12,410.76
6. Step 6: Final answer
   x = 5,468.72