Finding the Fourth Proportional to 3,890.80, 5,860.72 and 3,546.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.80 : 5,860.72 = 3,546.32 : x
2. Step 2: Convert to fraction form
   3,890.80/5,860.72 = 3,546.32/x
3. Step 3: Cross multiply
   3,890.80x = 5,860.72 × 3,546.32
4. Step 4: Simplify right side
   3,890.80x = 20,783,988.55
5. Step 5: Solve for x
   x = 20,783,988.55/3,890.80
6. Step 6: Final answer
   x = 5,341.83