Finding the Fourth Proportional to 3,953.76, 5,456.18 and 2,556.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953.76 : 5,456.18 = 2,556.50 : x
2. Step 2: Convert to fraction form
   3,953.76/5,456.18 = 2,556.50/x
3. Step 3: Cross multiply
   3,953.76x = 5,456.18 × 2,556.50
4. Step 4: Simplify right side
   3,953.76x = 13,948,724.17
5. Step 5: Solve for x
   x = 13,948,724.17/3,953.76
6. Step 6: Final answer
   x = 3,527.96