Finding the Fourth Proportional to 1,978.08, 2,967.32 and 679.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.08 : 2,967.32 = 679.38 : x
2. Step 2: Convert to fraction form
   1,978.08/2,967.32 = 679.38/x
3. Step 3: Cross multiply
   1,978.08x = 2,967.32 × 679.38
4. Step 4: Simplify right side
   1,978.08x = 2,015,919.63
5. Step 5: Solve for x
   x = 2,015,919.63/1,978.08
6. Step 6: Final answer
   x = 1,019.13