Finding the Fourth Proportional to 8,564.78, 12,845.20 and 3,298.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,564.78 : 12,845.20 = 3,298.06 : x
2. Step 2: Convert to fraction form
   8,564.78/12,845.20 = 3,298.06/x
3. Step 3: Cross multiply
   8,564.78x = 12,845.20 × 3,298.06
4. Step 4: Simplify right side
   8,564.78x = 42,364,240.31
5. Step 5: Solve for x
   x = 42,364,240.31/8,564.78
6. Step 6: Final answer
   x = 4,946.33