Finding the Fourth Proportional to 5,345.82, 7,379.69 and 3,929.51

Step by Step Solution

1. Step 1: Write the proportion equation
   5,345.82 : 7,379.69 = 3,929.51 : x
2. Step 2: Convert to fraction form
   5,345.82/7,379.69 = 3,929.51/x
3. Step 3: Cross multiply
   5,345.82x = 7,379.69 × 3,929.51
4. Step 4: Simplify right side
   5,345.82x = 28,998,564.45
5. Step 5: Solve for x
   x = 28,998,564.45/5,345.82
6. Step 6: Final answer
   x = 5,424.53