Finding the Fourth Proportional to 2,417.55, 3,336.71 and 1,578.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,417.55 : 3,336.71 = 1,578.39 : x
2. Step 2: Convert to fraction form
   2,417.55/3,336.71 = 1,578.39/x
3. Step 3: Cross multiply
   2,417.55x = 3,336.71 × 1,578.39
4. Step 4: Simplify right side
   2,417.55x = 5,266,621.80
5. Step 5: Solve for x
   x = 5,266,621.80/2,417.55
6. Step 6: Final answer
   x = 2,178.50