Finding the Fourth Proportional to 2,919.36, 4,377.72 and 1,275.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,919.36 : 4,377.72 = 1,275.12 : x
2. Step 2: Convert to fraction form
   2,919.36/4,377.72 = 1,275.12/x
3. Step 3: Cross multiply
   2,919.36x = 4,377.72 × 1,275.12
4. Step 4: Simplify right side
   2,919.36x = 5,582,118.33
5. Step 5: Solve for x
   x = 5,582,118.33/2,919.36
6. Step 6: Final answer
   x = 1,912.10