Finding the Fourth Proportional to 2,357.31, 3,253.14 and 1,309.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,357.31 : 3,253.14 = 1,309.35 : x
2. Step 2: Convert to fraction form
   2,357.31/3,253.14 = 1,309.35/x
3. Step 3: Cross multiply
   2,357.31x = 3,253.14 × 1,309.35
4. Step 4: Simplify right side
   2,357.31x = 4,259,498.86
5. Step 5: Solve for x
   x = 4,259,498.86/2,357.31
6. Step 6: Final answer
   x = 1,806.93