Finding the Fourth Proportional to 1,676.72, 2,314.02 and 978.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,676.72 : 2,314.02 = 978.32 : x
2. Step 2: Convert to fraction form
   1,676.72/2,314.02 = 978.32/x
3. Step 3: Cross multiply
   1,676.72x = 2,314.02 × 978.32
4. Step 4: Simplify right side
   1,676.72x = 2,263,852.05
5. Step 5: Solve for x
   x = 2,263,852.05/1,676.72
6. Step 6: Final answer
   x = 1,350.17