Finding the Fourth Proportional to 2,148.74, 2,965.37 and 1,309.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.74 : 2,965.37 = 1,309.31 : x
2. Step 2: Convert to fraction form
   2,148.74/2,965.37 = 1,309.31/x
3. Step 3: Cross multiply
   2,148.74x = 2,965.37 × 1,309.31
4. Step 4: Simplify right side
   2,148.74x = 3,882,577.04
5. Step 5: Solve for x
   x = 3,882,577.04/2,148.74
6. Step 6: Final answer
   x = 1,806.91