Finding the Fourth Proportional to 1,861.56, 2,786.90 and 1,166.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.56 : 2,786.90 = 1,166.00 : x
2. Step 2: Convert to fraction form
   1,861.56/2,786.90 = 1,166.00/x
3. Step 3: Cross multiply
   1,861.56x = 2,786.90 × 1,166.00
4. Step 4: Simplify right side
   1,861.56x = 3,249,505.64
5. Step 5: Solve for x
   x = 3,249,505.64/1,861.56
6. Step 6: Final answer
   x = 1,745.58