Finding the Fourth Proportional to 5,390.72, 7,441.16 and 3,402.57

Step by Step Solution

1. Step 1: Write the proportion equation
   5,390.72 : 7,441.16 = 3,402.57 : x
2. Step 2: Convert to fraction form
   5,390.72/7,441.16 = 3,402.57/x
3. Step 3: Cross multiply
   5,390.72x = 7,441.16 × 3,402.57
4. Step 4: Simplify right side
   5,390.72x = 25,319,067.78
5. Step 5: Solve for x
   x = 25,319,067.78/5,390.72
6. Step 6: Final answer
   x = 4,696.79