Finding the Fourth Proportional to 2,417.81, 3,336.56 and 1,355.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,417.81 : 3,336.56 = 1,355.57 : x
2. Step 2: Convert to fraction form
   2,417.81/3,336.56 = 1,355.57/x
3. Step 3: Cross multiply
   2,417.81x = 3,336.56 × 1,355.57
4. Step 4: Simplify right side
   2,417.81x = 4,522,942.20
5. Step 5: Solve for x
   x = 4,522,942.20/2,417.81
6. Step 6: Final answer
   x = 1,870.68