Finding the Fourth Proportional to 3,942.84, 5,438.82 and 2,545.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.84 : 5,438.82 = 2,545.59 : x
2. Step 2: Convert to fraction form
   3,942.84/5,438.82 = 2,545.59/x
3. Step 3: Cross multiply
   3,942.84x = 5,438.82 × 2,545.59
4. Step 4: Simplify right side
   3,942.84x = 13,845,005.80
5. Step 5: Solve for x
   x = 13,845,005.80/3,942.84
6. Step 6: Final answer
   x = 3,511.43