Finding the Fourth Proportional to 1,978.12, 2,967.54 and 679.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.12 : 2,967.54 = 679.27 : x
2. Step 2: Convert to fraction form
   1,978.12/2,967.54 = 679.27/x
3. Step 3: Cross multiply
   1,978.12x = 2,967.54 × 679.27
4. Step 4: Simplify right side
   1,978.12x = 2,015,760.90
5. Step 5: Solve for x
   x = 2,015,760.90/1,978.12
6. Step 6: Final answer
   x = 1,019.03