Finding the Fourth Proportional to 5,290.83, 7,920.67 and 3,910.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,290.83 : 7,920.67 = 3,910.32 : x
2. Step 2: Convert to fraction form
   5,290.83/7,920.67 = 3,910.32/x
3. Step 3: Cross multiply
   5,290.83x = 7,920.67 × 3,910.32
4. Step 4: Simplify right side
   5,290.83x = 30,972,314.96
5. Step 5: Solve for x
   x = 30,972,314.96/5,290.83
6. Step 6: Final answer
   x = 5,853.96