Finding the Fourth Proportional to 8,607.78, 12,912.89 and 2,762.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,607.78 : 12,912.89 = 2,762.42 : x
2. Step 2: Convert to fraction form
   8,607.78/12,912.89 = 2,762.42/x
3. Step 3: Cross multiply
   8,607.78x = 12,912.89 × 2,762.42
4. Step 4: Simplify right side
   8,607.78x = 35,670,747.22
5. Step 5: Solve for x
   x = 35,670,747.22/8,607.78
6. Step 6: Final answer
   x = 4,144.01