Finding the Fourth Proportional to 8,127.30, 12,188.52 and 3,447.21

Step by Step Solution

1. Step 1: Write the proportion equation
   8,127.30 : 12,188.52 = 3,447.21 : x
2. Step 2: Convert to fraction form
   8,127.30/12,188.52 = 3,447.21/x
3. Step 3: Cross multiply
   8,127.30x = 12,188.52 × 3,447.21
4. Step 4: Simplify right side
   8,127.30x = 42,016,388.03
5. Step 5: Solve for x
   x = 42,016,388.03/8,127.30
6. Step 6: Final answer
   x = 5,169.78