Finding the Fourth Proportional to 2,638.14, 3,956.90 and 1,076.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.14 : 3,956.90 = 1,076.55 : x
2. Step 2: Convert to fraction form
   2,638.14/3,956.90 = 1,076.55/x
3. Step 3: Cross multiply
   2,638.14x = 3,956.90 × 1,076.55
4. Step 4: Simplify right side
   2,638.14x = 4,259,795.31
5. Step 5: Solve for x
   x = 4,259,795.31/2,638.14
6. Step 6: Final answer
   x = 1,614.70