Finding the Fourth Proportional to 2,636.44, 3,957.34 and 1,321.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.44 : 3,957.34 = 1,321.14 : x
2. Step 2: Convert to fraction form
   2,636.44/3,957.34 = 1,321.14/x
3. Step 3: Cross multiply
   2,636.44x = 3,957.34 × 1,321.14
4. Step 4: Simplify right side
   2,636.44x = 5,228,200.17
5. Step 5: Solve for x
   x = 5,228,200.17/2,636.44
6. Step 6: Final answer
   x = 1,983.05