Finding the Fourth Proportional to 2,487.89, 3,433.26 and 1,439.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,487.89 : 3,433.26 = 1,439.93 : x
2. Step 2: Convert to fraction form
   2,487.89/3,433.26 = 1,439.93/x
3. Step 3: Cross multiply
   2,487.89x = 3,433.26 × 1,439.93
4. Step 4: Simplify right side
   2,487.89x = 4,943,654.07
5. Step 5: Solve for x
   x = 4,943,654.07/2,487.89
6. Step 6: Final answer
   x = 1,987.09