Finding the Fourth Proportional to 1,978.54, 2,965.07 and 1,919.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.54 : 2,965.07 = 1,919.41 : x
2. Step 2: Convert to fraction form
   1,978.54/2,965.07 = 1,919.41/x
3. Step 3: Cross multiply
   1,978.54x = 2,965.07 × 1,919.41
4. Step 4: Simplify right side
   1,978.54x = 5,691,182.39
5. Step 5: Solve for x
   x = 5,691,182.39/1,978.54
6. Step 6: Final answer
   x = 2,876.46