Finding the Fourth Proportional to 1,920.51, 2,879.33 and 1,055.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.51 : 2,879.33 = 1,055.07 : x
2. Step 2: Convert to fraction form
   1,920.51/2,879.33 = 1,055.07/x
3. Step 3: Cross multiply
   1,920.51x = 2,879.33 × 1,055.07
4. Step 4: Simplify right side
   1,920.51x = 3,037,889.43
5. Step 5: Solve for x
   x = 3,037,889.43/1,920.51
6. Step 6: Final answer
   x = 1,581.81