Finding the Fourth Proportional to 3,185.81, 4,395.71 and 1,788.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,185.81 : 4,395.71 = 1,788.47 : x
2. Step 2: Convert to fraction form
   3,185.81/4,395.71 = 1,788.47/x
3. Step 3: Cross multiply
   3,185.81x = 4,395.71 × 1,788.47
4. Step 4: Simplify right side
   3,185.81x = 7,861,586.52
5. Step 5: Solve for x
   x = 7,861,586.52/3,185.81
6. Step 6: Final answer
   x = 2,467.69