Finding the Fourth Proportional to 8,601.42, 12,904.15 and 2,678.03

Step by Step Solution

1. Step 1: Write the proportion equation
   8,601.42 : 12,904.15 = 2,678.03 : x
2. Step 2: Convert to fraction form
   8,601.42/12,904.15 = 2,678.03/x
3. Step 3: Cross multiply
   8,601.42x = 12,904.15 × 2,678.03
4. Step 4: Simplify right side
   8,601.42x = 34,557,700.82
5. Step 5: Solve for x
   x = 34,557,700.82/8,601.42
6. Step 6: Final answer
   x = 4,017.67