Finding the Fourth Proportional to 1,861.56, 2,568.98 and 1,065.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.56 : 2,568.98 = 1,065.05 : x
2. Step 2: Convert to fraction form
   1,861.56/2,568.98 = 1,065.05/x
3. Step 3: Cross multiply
   1,861.56x = 2,568.98 × 1,065.05
4. Step 4: Simplify right side
   1,861.56x = 2,736,092.15
5. Step 5: Solve for x
   x = 2,736,092.15/1,861.56
6. Step 6: Final answer
   x = 1,469.78