Finding the Fourth Proportional to 8,461.31, 12,693.18 and 2,618.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,461.31 : 12,693.18 = 2,618.42 : x
2. Step 2: Convert to fraction form
   8,461.31/12,693.18 = 2,618.42/x
3. Step 3: Cross multiply
   8,461.31x = 12,693.18 × 2,618.42
4. Step 4: Simplify right side
   8,461.31x = 33,236,076.38
5. Step 5: Solve for x
   x = 33,236,076.38/8,461.31
6. Step 6: Final answer
   x = 3,928.01