Finding the Fourth Proportional to 1,856.21, 2,561.42 and 1,016.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.21 : 2,561.42 = 1,016.89 : x
2. Step 2: Convert to fraction form
   1,856.21/2,561.42 = 1,016.89/x
3. Step 3: Cross multiply
   1,856.21x = 2,561.42 × 1,016.89
4. Step 4: Simplify right side
   1,856.21x = 2,604,678.52
5. Step 5: Solve for x
   x = 2,604,678.52/1,856.21
6. Step 6: Final answer
   x = 1,403.23