Finding the Fourth Proportional to 2,086.73, 2,879.93 and 1,247.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.73 : 2,879.93 = 1,247.42 : x
2. Step 2: Convert to fraction form
   2,086.73/2,879.93 = 1,247.42/x
3. Step 3: Cross multiply
   2,086.73x = 2,879.93 × 1,247.42
4. Step 4: Simplify right side
   2,086.73x = 3,592,492.60
5. Step 5: Solve for x
   x = 3,592,492.60/2,086.73
6. Step 6: Final answer
   x = 1,721.59