Finding the Fourth Proportional to 2,387.31, 3,580.81 and 1,419.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.31 : 3,580.81 = 1,419.57 : x
2. Step 2: Convert to fraction form
   2,387.31/3,580.81 = 1,419.57/x
3. Step 3: Cross multiply
   2,387.31x = 3,580.81 × 1,419.57
4. Step 4: Simplify right side
   2,387.31x = 5,083,210.45
5. Step 5: Solve for x
   x = 5,083,210.45/2,387.31
6. Step 6: Final answer
   x = 2,129.26