Finding the Fourth Proportional to 2,589.71, 3,886.54 and 1,898.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589.71 : 3,886.54 = 1,898.15 : x
2. Step 2: Convert to fraction form
   2,589.71/3,886.54 = 1,898.15/x
3. Step 3: Cross multiply
   2,589.71x = 3,886.54 × 1,898.15
4. Step 4: Simplify right side
   2,589.71x = 7,377,235.90
5. Step 5: Solve for x
   x = 7,377,235.90/2,589.71
6. Step 6: Final answer
   x = 2,848.67