Finding the Fourth Proportional to 2,866.56, 3,956.72 and 2,477.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,866.56 : 3,956.72 = 2,477.76 : x
2. Step 2: Convert to fraction form
   2,866.56/3,956.72 = 2,477.76/x
3. Step 3: Cross multiply
   2,866.56x = 3,956.72 × 2,477.76
4. Step 4: Simplify right side
   2,866.56x = 9,803,802.55
5. Step 5: Solve for x
   x = 9,803,802.55/2,866.56
6. Step 6: Final answer
   x = 3,420.06