Finding the Fourth Proportional to 3,111.71, 4,300.29 and 2,551.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.71 : 4,300.29 = 2,551.28 : x
2. Step 2: Convert to fraction form
   3,111.71/4,300.29 = 2,551.28/x
3. Step 3: Cross multiply
   3,111.71x = 4,300.29 × 2,551.28
4. Step 4: Simplify right side
   3,111.71x = 10,971,222.37
5. Step 5: Solve for x
   x = 10,971,222.37/3,111.71
6. Step 6: Final answer
   x = 3,525.79