Finding the Fourth Proportional to 3,978.23, 5,492.02 and 2,804.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.23 : 5,492.02 = 2,804.54 : x
2. Step 2: Convert to fraction form
   3,978.23/5,492.02 = 2,804.54/x
3. Step 3: Cross multiply
   3,978.23x = 5,492.02 × 2,804.54
4. Step 4: Simplify right side
   3,978.23x = 15,402,589.77
5. Step 5: Solve for x
   x = 15,402,589.77/3,978.23
6. Step 6: Final answer
   x = 3,871.72