Finding the Fourth Proportional to 1,896.61, 2,617.17 and 1,057.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,896.61 : 2,617.17 = 1,057.27 : x
2. Step 2: Convert to fraction form
   1,896.61/2,617.17 = 1,057.27/x
3. Step 3: Cross multiply
   1,896.61x = 2,617.17 × 1,057.27
4. Step 4: Simplify right side
   1,896.61x = 2,767,055.33
5. Step 5: Solve for x
   x = 2,767,055.33/1,896.61
6. Step 6: Final answer
   x = 1,458.95