Finding the Fourth Proportional to 3,886.80, 5,363.82 and 2,315.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.80 : 5,363.82 = 2,315.04 : x
2. Step 2: Convert to fraction form
   3,886.80/5,363.82 = 2,315.04/x
3. Step 3: Cross multiply
   3,886.80x = 5,363.82 × 2,315.04
4. Step 4: Simplify right side
   3,886.80x = 12,417,457.85
5. Step 5: Solve for x
   x = 12,417,457.85/3,886.80
6. Step 6: Final answer
   x = 3,194.78