Finding the Fourth Proportional to 1,858.71, 2,786.04 and 1,165.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.71 : 2,786.04 = 1,165.89 : x
2. Step 2: Convert to fraction form
   1,858.71/2,786.04 = 1,165.89/x
3. Step 3: Cross multiply
   1,858.71x = 2,786.04 × 1,165.89
4. Step 4: Simplify right side
   1,858.71x = 3,248,216.18
5. Step 5: Solve for x
   x = 3,248,216.18/1,858.71
6. Step 6: Final answer
   x = 1,747.56