Finding the Fourth Proportional to 1,896.76, 2,617.59 and 1,057.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,896.76 : 2,617.59 = 1,057.47 : x
2. Step 2: Convert to fraction form
   1,896.76/2,617.59 = 1,057.47/x
3. Step 3: Cross multiply
   1,896.76x = 2,617.59 × 1,057.47
4. Step 4: Simplify right side
   1,896.76x = 2,768,022.90
5. Step 5: Solve for x
   x = 2,768,022.90/1,896.76
6. Step 6: Final answer
   x = 1,459.34