Finding the Fourth Proportional to 2,590.86, 3,867.50 and 2,398.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.86 : 3,867.50 = 2,398.15 : x
2. Step 2: Convert to fraction form
   2,590.86/3,867.50 = 2,398.15/x
3. Step 3: Cross multiply
   2,590.86x = 3,867.50 × 2,398.15
4. Step 4: Simplify right side
   2,590.86x = 9,274,845.13
5. Step 5: Solve for x
   x = 9,274,845.13/2,590.86
6. Step 6: Final answer
   x = 3,579.83