Finding the Fourth Proportional to 5,428.69, 8,132.51 and 3,574.22

Step by Step Solution

1. Step 1: Write the proportion equation
   5,428.69 : 8,132.51 = 3,574.22 : x
2. Step 2: Convert to fraction form
   5,428.69/8,132.51 = 3,574.22/x
3. Step 3: Cross multiply
   5,428.69x = 8,132.51 × 3,574.22
4. Step 4: Simplify right side
   5,428.69x = 29,067,379.89
5. Step 5: Solve for x
   x = 29,067,379.89/5,428.69
6. Step 6: Final answer
   x = 5,354.40