Finding the Fourth Proportional to 1,857.15, 2,562.89 and 1,071.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,857.15 : 2,562.89 = 1,071.27 : x
2. Step 2: Convert to fraction form
   1,857.15/2,562.89 = 1,071.27/x
3. Step 3: Cross multiply
   1,857.15x = 2,562.89 × 1,071.27
4. Step 4: Simplify right side
   1,857.15x = 2,745,541.81
5. Step 5: Solve for x
   x = 2,745,541.81/1,857.15
6. Step 6: Final answer
   x = 1,478.36