Finding the Fourth Proportional to 2,084.86, 3,128.83 and 1,678.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,084.86 : 3,128.83 = 1,678.89 : x
2. Step 2: Convert to fraction form
   2,084.86/3,128.83 = 1,678.89/x
3. Step 3: Cross multiply
   2,084.86x = 3,128.83 × 1,678.89
4. Step 4: Simplify right side
   2,084.86x = 5,252,968.93
5. Step 5: Solve for x
   x = 5,252,968.93/2,084.86
6. Step 6: Final answer
   x = 2,519.58