Finding the Fourth Proportional to 2,713.42, 4,070.31 and 864.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,713.42 : 4,070.31 = 864.69 : x
2. Step 2: Convert to fraction form
   2,713.42/4,070.31 = 864.69/x
3. Step 3: Cross multiply
   2,713.42x = 4,070.31 × 864.69
4. Step 4: Simplify right side
   2,713.42x = 3,519,556.35
5. Step 5: Solve for x
   x = 3,519,556.35/2,713.42
6. Step 6: Final answer
   x = 1,297.09