Finding the Fourth Proportional to 3,675.78, 5,072.22 and 2,103.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,675.78 : 5,072.22 = 2,103.57 : x
2. Step 2: Convert to fraction form
   3,675.78/5,072.22 = 2,103.57/x
3. Step 3: Cross multiply
   3,675.78x = 5,072.22 × 2,103.57
4. Step 4: Simplify right side
   3,675.78x = 10,669,769.83
5. Step 5: Solve for x
   x = 10,669,769.83/3,675.78
6. Step 6: Final answer
   x = 2,902.72