Finding the Fourth Proportional to 1,786.59, 2,676.15 and 1,239.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,786.59 : 2,676.15 = 1,239.84 : x
2. Step 2: Convert to fraction form
   1,786.59/2,676.15 = 1,239.84/x
3. Step 3: Cross multiply
   1,786.59x = 2,676.15 × 1,239.84
4. Step 4: Simplify right side
   1,786.59x = 3,317,997.82
5. Step 5: Solve for x
   x = 3,317,997.82/1,786.59
6. Step 6: Final answer
   x = 1,857.17