Finding the Fourth Proportional to 8,648.57, 12,974.67 and 2,804.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.57 : 12,974.67 = 2,804.72 : x
2. Step 2: Convert to fraction form
   8,648.57/12,974.67 = 2,804.72/x
3. Step 3: Cross multiply
   8,648.57x = 12,974.67 × 2,804.72
4. Step 4: Simplify right side
   8,648.57x = 36,390,300.22
5. Step 5: Solve for x
   x = 36,390,300.22/8,648.57
6. Step 6: Final answer
   x = 4,207.67