Finding the Fourth Proportional to 3,915.77, 5,403.89 and 2,236.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.77 : 5,403.89 = 2,236.82 : x
2. Step 2: Convert to fraction form
   3,915.77/5,403.89 = 2,236.82/x
3. Step 3: Cross multiply
   3,915.77x = 5,403.89 × 2,236.82
4. Step 4: Simplify right side
   3,915.77x = 12,087,529.23
5. Step 5: Solve for x
   x = 12,087,529.23/3,915.77
6. Step 6: Final answer
   x = 3,086.88