Finding the Fourth Proportional to 2,013.72, 2,771.17 and 1,956.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.72 : 2,771.17 = 1,956.61 : x
2. Step 2: Convert to fraction form
   2,013.72/2,771.17 = 1,956.61/x
3. Step 3: Cross multiply
   2,013.72x = 2,771.17 × 1,956.61
4. Step 4: Simplify right side
   2,013.72x = 5,422,098.93
5. Step 5: Solve for x
   x = 5,422,098.93/2,013.72
6. Step 6: Final answer
   x = 2,692.58