Finding the Fourth Proportional to 2,635.96, 3,952.56 and 1,318.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.96 : 3,952.56 = 1,318.30 : x
2. Step 2: Convert to fraction form
   2,635.96/3,952.56 = 1,318.30/x
3. Step 3: Cross multiply
   2,635.96x = 3,952.56 × 1,318.30
4. Step 4: Simplify right side
   2,635.96x = 5,210,659.85
5. Step 5: Solve for x
   x = 5,210,659.85/2,635.96
6. Step 6: Final answer
   x = 1,976.76