Finding the Fourth Proportional to 8,388.58, 12,582.78 and 3,456.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,388.58 : 12,582.78 = 3,456.76 : x
2. Step 2: Convert to fraction form
   8,388.58/12,582.78 = 3,456.76/x
3. Step 3: Cross multiply
   8,388.58x = 12,582.78 × 3,456.76
4. Step 4: Simplify right side
   8,388.58x = 43,495,650.59
5. Step 5: Solve for x
   x = 43,495,650.59/8,388.58
6. Step 6: Final answer
   x = 5,185.10