Finding the Fourth Proportional to 8,362.91, 12,538.67 and 3,980.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,362.91 : 12,538.67 = 3,980.81 : x
2. Step 2: Convert to fraction form
   8,362.91/12,538.67 = 3,980.81/x
3. Step 3: Cross multiply
   8,362.91x = 12,538.67 × 3,980.81
4. Step 4: Simplify right side
   8,362.91x = 49,914,074.37
5. Step 5: Solve for x
   x = 49,914,074.37/8,362.91
6. Step 6: Final answer
   x = 5,968.50