Finding the Fourth Proportional to 3,886.16, 5,361.72 and 3,511.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.16 : 5,361.72 = 3,511.94 : x
2. Step 2: Convert to fraction form
   3,886.16/5,361.72 = 3,511.94/x
3. Step 3: Cross multiply
   3,886.16x = 5,361.72 × 3,511.94
4. Step 4: Simplify right side
   3,886.16x = 18,830,012.13
5. Step 5: Solve for x
   x = 18,830,012.13/3,886.16
6. Step 6: Final answer
   x = 4,845.41