Finding the Fourth Proportional to 2,916.22, 4,013.47 and 2,680.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,916.22 : 4,013.47 = 2,680.18 : x
2. Step 2: Convert to fraction form
   2,916.22/4,013.47 = 2,680.18/x
3. Step 3: Cross multiply
   2,916.22x = 4,013.47 × 2,680.18
4. Step 4: Simplify right side
   2,916.22x = 10,756,822.02
5. Step 5: Solve for x
   x = 10,756,822.02/2,916.22
6. Step 6: Final answer
   x = 3,688.62