Finding the Fourth Proportional to 1,676.69, 2,314.04 and 978.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,676.69 : 2,314.04 = 978.06 : x
2. Step 2: Convert to fraction form
   1,676.69/2,314.04 = 978.06/x
3. Step 3: Cross multiply
   1,676.69x = 2,314.04 × 978.06
4. Step 4: Simplify right side
   1,676.69x = 2,263,269.96
5. Step 5: Solve for x
   x = 2,263,269.96/1,676.69
6. Step 6: Final answer
   x = 1,349.84