Finding the Fourth Proportional to 1,861.56, 2,568.86 and 1,105.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.56 : 2,568.86 = 1,105.38 : x
2. Step 2: Convert to fraction form
   1,861.56/2,568.86 = 1,105.38/x
3. Step 3: Cross multiply
   1,861.56x = 2,568.86 × 1,105.38
4. Step 4: Simplify right side
   1,861.56x = 2,839,559.60
5. Step 5: Solve for x
   x = 2,839,559.60/1,861.56
6. Step 6: Final answer
   x = 1,525.36