Finding the Fourth Proportional to 3,411.72, 4,709.76 and 2,572.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,411.72 : 4,709.76 = 2,572.78 : x
2. Step 2: Convert to fraction form
   3,411.72/4,709.76 = 2,572.78/x
3. Step 3: Cross multiply
   3,411.72x = 4,709.76 × 2,572.78
4. Step 4: Simplify right side
   3,411.72x = 12,117,176.33
5. Step 5: Solve for x
   x = 12,117,176.33/3,411.72
6. Step 6: Final answer
   x = 3,551.63