Finding the Fourth Proportional to 8,603.72, 12,907.70 and 2,760.33

Step by Step Solution

1. Step 1: Write the proportion equation
   8,603.72 : 12,907.70 = 2,760.33 : x
2. Step 2: Convert to fraction form
   8,603.72/12,907.70 = 2,760.33/x
3. Step 3: Cross multiply
   8,603.72x = 12,907.70 × 2,760.33
4. Step 4: Simplify right side
   8,603.72x = 35,629,499.42
5. Step 5: Solve for x
   x = 35,629,499.42/8,603.72
6. Step 6: Final answer
   x = 4,141.17