Finding the Fourth Proportional to 1,856.15, 2,561.49 and 1,016.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.15 : 2,561.49 = 1,016.91 : x
2. Step 2: Convert to fraction form
   1,856.15/2,561.49 = 1,016.91/x
3. Step 3: Cross multiply
   1,856.15x = 2,561.49 × 1,016.91
4. Step 4: Simplify right side
   1,856.15x = 2,604,796.16
5. Step 5: Solve for x
   x = 2,604,796.16/1,856.15
6. Step 6: Final answer
   x = 1,403.33