Finding the Fourth Proportional to 8,315.88, 12,465.59 and 3,388.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,315.88 : 12,465.59 = 3,388.38 : x
2. Step 2: Convert to fraction form
   8,315.88/12,465.59 = 3,388.38/x
3. Step 3: Cross multiply
   8,315.88x = 12,465.59 × 3,388.38
4. Step 4: Simplify right side
   8,315.88x = 42,238,138.90
5. Step 5: Solve for x
   x = 42,238,138.90/8,315.88
6. Step 6: Final answer
   x = 5,079.21