Finding the Fourth Proportional to 2,655.20, 3,981.72 and 2,133.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,655.20 : 3,981.72 = 2,133.56 : x
2. Step 2: Convert to fraction form
   2,655.20/3,981.72 = 2,133.56/x
3. Step 3: Cross multiply
   2,655.20x = 3,981.72 × 2,133.56
4. Step 4: Simplify right side
   2,655.20x = 8,495,238.52
5. Step 5: Solve for x
   x = 8,495,238.52/2,655.20
6. Step 6: Final answer
   x = 3,199.47