Finding the Fourth Proportional to 1,896.72, 2,617.52 and 1,057.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,896.72 : 2,617.52 = 1,057.49 : x
2. Step 2: Convert to fraction form
   1,896.72/2,617.52 = 1,057.49/x
3. Step 3: Cross multiply
   1,896.72x = 2,617.52 × 1,057.49
4. Step 4: Simplify right side
   1,896.72x = 2,767,992.67
5. Step 5: Solve for x
   x = 2,767,992.67/1,896.72
6. Step 6: Final answer
   x = 1,459.36