Finding the Fourth Proportional to 3,807.77, 5,255.15 and 2,315.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807.77 : 5,255.15 = 2,315.54 : x
2. Step 2: Convert to fraction form
   3,807.77/5,255.15 = 2,315.54/x
3. Step 3: Cross multiply
   3,807.77x = 5,255.15 × 2,315.54
4. Step 4: Simplify right side
   3,807.77x = 12,168,511.59
5. Step 5: Solve for x
   x = 12,168,511.59/3,807.77
6. Step 6: Final answer
   x = 3,195.71