Finding the Fourth Proportional to 3,886.72, 5,859.38 and 3,636.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.72 : 5,859.38 = 3,636.16 : x
2. Step 2: Convert to fraction form
   3,886.72/5,859.38 = 3,636.16/x
3. Step 3: Cross multiply
   3,886.72x = 5,859.38 × 3,636.16
4. Step 4: Simplify right side
   3,886.72x = 21,305,643.18
5. Step 5: Solve for x
   x = 21,305,643.18/3,886.72
6. Step 6: Final answer
   x = 5,481.65