Finding the Fourth Proportional to 8,389.98, 12,581.55 and 3,646.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,389.98 : 12,581.55 = 3,646.47 : x
2. Step 2: Convert to fraction form
   8,389.98/12,581.55 = 3,646.47/x
3. Step 3: Cross multiply
   8,389.98x = 12,581.55 × 3,646.47
4. Step 4: Simplify right side
   8,389.98x = 45,878,231.29
5. Step 5: Solve for x
   x = 45,878,231.29/8,389.98
6. Step 6: Final answer
   x = 5,468.22