Finding the Fourth Proportional to 2,079.91, 2,870.63 and 1,986.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.91 : 2,870.63 = 1,986.49 : x
2. Step 2: Convert to fraction form
   2,079.91/2,870.63 = 1,986.49/x
3. Step 3: Cross multiply
   2,079.91x = 2,870.63 × 1,986.49
4. Step 4: Simplify right side
   2,079.91x = 5,702,477.79
5. Step 5: Solve for x
   x = 5,702,477.79/2,079.91
6. Step 6: Final answer
   x = 2,741.69