Finding the Fourth Proportional to 2,371.95, 3,556.78 and 1,121.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,371.95 : 3,556.78 = 1,121.50 : x
2. Step 2: Convert to fraction form
   2,371.95/3,556.78 = 1,121.50/x
3. Step 3: Cross multiply
   2,371.95x = 3,556.78 × 1,121.50
4. Step 4: Simplify right side
   2,371.95x = 3,988,916.98
5. Step 5: Solve for x
   x = 3,988,916.98/2,371.95
6. Step 6: Final answer
   x = 1,681.71