Finding the Fourth Proportional to 1,676.29, 2,315.72 and 1,236.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,676.29 : 2,315.72 = 1,236.61 : x
2. Step 2: Convert to fraction form
   1,676.29/2,315.72 = 1,236.61/x
3. Step 3: Cross multiply
   1,676.29x = 2,315.72 × 1,236.61
4. Step 4: Simplify right side
   1,676.29x = 2,863,642.51
5. Step 5: Solve for x
   x = 2,863,642.51/1,676.29
6. Step 6: Final answer
   x = 1,708.32