Finding the Fourth Proportional to 3,916.16, 5,400.32 and 2,588.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.16 : 5,400.32 = 2,588.48 : x
2. Step 2: Convert to fraction form
   3,916.16/5,400.32 = 2,588.48/x
3. Step 3: Cross multiply
   3,916.16x = 5,400.32 × 2,588.48
4. Step 4: Simplify right side
   3,916.16x = 13,978,620.31
5. Step 5: Solve for x
   x = 13,978,620.31/3,916.16
6. Step 6: Final answer
   x = 3,569.47