Finding the Fourth Proportional to 3,859.48, 5,784.81 and 2,399.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.48 : 5,784.81 = 2,399.62 : x
2. Step 2: Convert to fraction form
   3,859.48/5,784.81 = 2,399.62/x
3. Step 3: Cross multiply
   3,859.48x = 5,784.81 × 2,399.62
4. Step 4: Simplify right side
   3,859.48x = 13,881,345.77
5. Step 5: Solve for x
   x = 13,881,345.77/3,859.48
6. Step 6: Final answer
   x = 3,596.69