Finding the Fourth Proportional to 2,403.71, 3,316.55 and 1,355.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,403.71 : 3,316.55 = 1,355.78 : x
2. Step 2: Convert to fraction form
   2,403.71/3,316.55 = 1,355.78/x
3. Step 3: Cross multiply
   2,403.71x = 3,316.55 × 1,355.78
4. Step 4: Simplify right side
   2,403.71x = 4,496,488.80
5. Step 5: Solve for x
   x = 4,496,488.80/2,403.71
6. Step 6: Final answer
   x = 1,870.65