Finding the Fourth Proportional to 3,870.12, 5,800.32 and 2,776.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.12 : 5,800.32 = 2,776.62 : x
2. Step 2: Convert to fraction form
   3,870.12/5,800.32 = 2,776.62/x
3. Step 3: Cross multiply
   3,870.12x = 5,800.32 × 2,776.62
4. Step 4: Simplify right side
   3,870.12x = 16,105,284.52
5. Step 5: Solve for x
   x = 16,105,284.52/3,870.12
6. Step 6: Final answer
   x = 4,161.44