Finding the Fourth Proportional to 8,340.27, 12,510.15 and 3,408.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,340.27 : 12,510.15 = 3,408.72 : x
2. Step 2: Convert to fraction form
   8,340.27/12,510.15 = 3,408.72/x
3. Step 3: Cross multiply
   8,340.27x = 12,510.15 × 3,408.72
4. Step 4: Simplify right side
   8,340.27x = 42,643,598.51
5. Step 5: Solve for x
   x = 42,643,598.51/8,340.27
6. Step 6: Final answer
   x = 5,112.98