Finding the Fourth Proportional to 2,085.86, 3,130.33 and 1,679.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.86 : 3,130.33 = 1,679.89 : x
2. Step 2: Convert to fraction form
   2,085.86/3,130.33 = 1,679.89/x
3. Step 3: Cross multiply
   2,085.86x = 3,130.33 × 1,679.89
4. Step 4: Simplify right side
   2,085.86x = 5,258,610.06
5. Step 5: Solve for x
   x = 5,258,610.06/2,085.86
6. Step 6: Final answer
   x = 2,521.08