Finding the Fourth Proportional to 2,619.23, 3,924.18 and 1,387.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.23 : 3,924.18 = 1,387.49 : x
2. Step 2: Convert to fraction form
   2,619.23/3,924.18 = 1,387.49/x
3. Step 3: Cross multiply
   2,619.23x = 3,924.18 × 1,387.49
4. Step 4: Simplify right side
   2,619.23x = 5,444,740.89
5. Step 5: Solve for x
   x = 5,444,740.89/2,619.23
6. Step 6: Final answer
   x = 2,078.76