Finding the Fourth Proportional to 3,196.40, 4,415.10 and 2,355.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,196.40 : 4,415.10 = 2,355.80 : x
2. Step 2: Convert to fraction form
   3,196.40/4,415.10 = 2,355.80/x
3. Step 3: Cross multiply
   3,196.40x = 4,415.10 × 2,355.80
4. Step 4: Simplify right side
   3,196.40x = 10,401,092.58
5. Step 5: Solve for x
   x = 10,401,092.58/3,196.40
6. Step 6: Final answer
   x = 3,254.00