Finding the Fourth Proportional to 1,843.21, 2,543.61 and 1,057.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,843.21 : 2,543.61 = 1,057.38 : x
2. Step 2: Convert to fraction form
   1,843.21/2,543.61 = 1,057.38/x
3. Step 3: Cross multiply
   1,843.21x = 2,543.61 × 1,057.38
4. Step 4: Simplify right side
   1,843.21x = 2,689,562.34
5. Step 5: Solve for x
   x = 2,689,562.34/1,843.21
6. Step 6: Final answer
   x = 1,459.17