Finding the Fourth Proportional to 2,868.80, 3,956.06 and 2,642.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,868.80 : 3,956.06 = 2,642.82 : x
2. Step 2: Convert to fraction form
   2,868.80/3,956.06 = 2,642.82/x
3. Step 3: Cross multiply
   2,868.80x = 3,956.06 × 2,642.82
4. Step 4: Simplify right side
   2,868.80x = 10,455,154.49
5. Step 5: Solve for x
   x = 10,455,154.49/2,868.80
6. Step 6: Final answer
   x = 3,644.43