Finding the Fourth Proportional to 7,185.94, 9,916.56 and 4,042.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,185.94 : 9,916.56 = 4,042.12 : x
2. Step 2: Convert to fraction form
   7,185.94/9,916.56 = 4,042.12/x
3. Step 3: Cross multiply
   7,185.94x = 9,916.56 × 4,042.12
4. Step 4: Simplify right side
   7,185.94x = 40,083,925.51
5. Step 5: Solve for x
   x = 40,083,925.51/7,185.94
6. Step 6: Final answer
   x = 5,578.10