Finding the Fourth Proportional to 8,540.96, 12,810.98 and 3,278.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,540.96 : 12,810.98 = 3,278.49 : x
2. Step 2: Convert to fraction form
   8,540.96/12,810.98 = 3,278.49/x
3. Step 3: Cross multiply
   8,540.96x = 12,810.98 × 3,278.49
4. Step 4: Simplify right side
   8,540.96x = 42,000,653.43
5. Step 5: Solve for x
   x = 42,000,653.43/8,540.96
6. Step 6: Final answer
   x = 4,917.56