Finding the Fourth Proportional to 3,980.92, 5,492.73 and 2,784.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.92 : 5,492.73 = 2,784.42 : x
2. Step 2: Convert to fraction form
   3,980.92/5,492.73 = 2,784.42/x
3. Step 3: Cross multiply
   3,980.92x = 5,492.73 × 2,784.42
4. Step 4: Simplify right side
   3,980.92x = 15,294,067.27
5. Step 5: Solve for x
   x = 15,294,067.27/3,980.92
6. Step 6: Final answer
   x = 3,841.84