Finding the Fourth Proportional to 8,280.47, 12,426.28 and 3,086.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,280.47 : 12,426.28 = 3,086.34 : x
2. Step 2: Convert to fraction form
   8,280.47/12,426.28 = 3,086.34/x
3. Step 3: Cross multiply
   8,280.47x = 12,426.28 × 3,086.34
4. Step 4: Simplify right side
   8,280.47x = 38,351,709.58
5. Step 5: Solve for x
   x = 38,351,709.58/8,280.47
6. Step 6: Final answer
   x = 4,631.59