Finding the Fourth Proportional to 3,870.15, 5,807.25 and 3,661.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.15 : 5,807.25 = 3,661.04 : x
2. Step 2: Convert to fraction form
   3,870.15/5,807.25 = 3,661.04/x
3. Step 3: Cross multiply
   3,870.15x = 5,807.25 × 3,661.04
4. Step 4: Simplify right side
   3,870.15x = 21,260,545.50
5. Step 5: Solve for x
   x = 21,260,545.50/3,870.15
6. Step 6: Final answer
   x = 5,493.47