Finding the Fourth Proportional to 3,992.15, 5,469.27 and 3,842.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,992.15 : 5,469.27 = 3,842.51 : x
2. Step 2: Convert to fraction form
   3,992.15/5,469.27 = 3,842.51/x
3. Step 3: Cross multiply
   3,992.15x = 5,469.27 × 3,842.51
4. Step 4: Simplify right side
   3,992.15x = 21,015,709.10
5. Step 5: Solve for x
   x = 21,015,709.10/3,992.15
6. Step 6: Final answer
   x = 5,264.26