Finding the Fourth Proportional to 2,057.93, 3,083.21 and 1,405.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.93 : 3,083.21 = 1,405.47 : x
2. Step 2: Convert to fraction form
   2,057.93/3,083.21 = 1,405.47/x
3. Step 3: Cross multiply
   2,057.93x = 3,083.21 × 1,405.47
4. Step 4: Simplify right side
   2,057.93x = 4,333,359.16
5. Step 5: Solve for x
   x = 4,333,359.16/2,057.93
6. Step 6: Final answer
   x = 2,105.69