Finding the Fourth Proportional to 1,856.18, 2,561.43 and 1,016.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.18 : 2,561.43 = 1,016.72 : x
2. Step 2: Convert to fraction form
   1,856.18/2,561.43 = 1,016.72/x
3. Step 3: Cross multiply
   1,856.18x = 2,561.43 × 1,016.72
4. Step 4: Simplify right side
   1,856.18x = 2,604,257.11
5. Step 5: Solve for x
   x = 2,604,257.11/1,856.18
6. Step 6: Final answer
   x = 1,403.02