Finding the Fourth Proportional to 2,589.98, 3,881.88 and 1,355.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589.98 : 3,881.88 = 1,355.20 : x
2. Step 2: Convert to fraction form
   2,589.98/3,881.88 = 1,355.20/x
3. Step 3: Cross multiply
   2,589.98x = 3,881.88 × 1,355.20
4. Step 4: Simplify right side
   2,589.98x = 5,260,714.07
5. Step 5: Solve for x
   x = 5,260,714.07/2,589.98
6. Step 6: Final answer
   x = 2,031.18