Finding the Fourth Proportional to 2,403.09, 3,316.22 and 1,355.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,403.09 : 3,316.22 = 1,355.15 : x
2. Step 2: Convert to fraction form
   2,403.09/3,316.22 = 1,355.15/x
3. Step 3: Cross multiply
   2,403.09x = 3,316.22 × 1,355.15
4. Step 4: Simplify right side
   2,403.09x = 4,493,975.53
5. Step 5: Solve for x
   x = 4,493,975.53/2,403.09
6. Step 6: Final answer
   x = 1,870.08