Finding the Fourth Proportional to 2,276.91, 3,140.86 and 1,686.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.91 : 3,140.86 = 1,686.42 : x
2. Step 2: Convert to fraction form
   2,276.91/3,140.86 = 1,686.42/x
3. Step 3: Cross multiply
   2,276.91x = 3,140.86 × 1,686.42
4. Step 4: Simplify right side
   2,276.91x = 5,296,809.12
5. Step 5: Solve for x
   x = 5,296,809.12/2,276.91
6. Step 6: Final answer
   x = 2,326.31