Finding the Fourth Proportional to 1,938.35, 2,887 and 1,928.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,938.35 : 2,887 = 1,928.91 : x
2. Step 2: Convert to fraction form
   1,938.35/2,887 = 1,928.91/x
3. Step 3: Cross multiply
   1,938.35x = 2,887 × 1,928.91
4. Step 4: Simplify right side
   1,938.35x = 5,568,763.17
5. Step 5: Solve for x
   x = 5,568,763.17/1,938.35
6. Step 6: Final answer
   x = 2,872.94