Finding the Fourth Proportional to 2,148.83, 2,965.31 and 1,309.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.83 : 2,965.31 = 1,309.23 : x
2. Step 2: Convert to fraction form
   2,148.83/2,965.31 = 1,309.23/x
3. Step 3: Cross multiply
   2,148.83x = 2,965.31 × 1,309.23
4. Step 4: Simplify right side
   2,148.83x = 3,882,271.17
5. Step 5: Solve for x
   x = 3,882,271.17/2,148.83
6. Step 6: Final answer
   x = 1,806.69