Finding the Fourth Proportional to 2,877.12, 4,314.69 and 928.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,877.12 : 4,314.69 = 928.89 : x
2. Step 2: Convert to fraction form
   2,877.12/4,314.69 = 928.89/x
3. Step 3: Cross multiply
   2,877.12x = 4,314.69 × 928.89
4. Step 4: Simplify right side
   2,877.12x = 4,007,872.39
5. Step 5: Solve for x
   x = 4,007,872.39/2,877.12
6. Step 6: Final answer
   x = 1,393.02