Finding the Fourth Proportional to 2,656.81, 3,981.57 and 1,355.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656.81 : 3,981.57 = 1,355.55 : x
2. Step 2: Convert to fraction form
   2,656.81/3,981.57 = 1,355.55/x
3. Step 3: Cross multiply
   2,656.81x = 3,981.57 × 1,355.55
4. Step 4: Simplify right side
   2,656.81x = 5,397,217.21
5. Step 5: Solve for x
   x = 5,397,217.21/2,656.81
6. Step 6: Final answer
   x = 2,031.47