Finding the Fourth Proportional to 1,676.10, 2,315.27 and 1,287.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,676.10 : 2,315.27 = 1,287.98 : x
2. Step 2: Convert to fraction form
   1,676.10/2,315.27 = 1,287.98/x
3. Step 3: Cross multiply
   1,676.10x = 2,315.27 × 1,287.98
4. Step 4: Simplify right side
   1,676.10x = 2,982,013.10
5. Step 5: Solve for x
   x = 2,982,013.10/1,676.10
6. Step 6: Final answer
   x = 1,779.14