Finding the Fourth Proportional to 2,845.82, 3,926.72 and 2,100.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,845.82 : 3,926.72 = 2,100.42 : x
2. Step 2: Convert to fraction form
   2,845.82/3,926.72 = 2,100.42/x
3. Step 3: Cross multiply
   2,845.82x = 3,926.72 × 2,100.42
4. Step 4: Simplify right side
   2,845.82x = 8,247,750.72
5. Step 5: Solve for x
   x = 8,247,750.72/2,845.82
6. Step 6: Final answer
   x = 2,898.20