Finding the Fourth Proportional to 2,259.90, 3,115.55 and 1,839.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.90 : 3,115.55 = 1,839.61 : x
2. Step 2: Convert to fraction form
   2,259.90/3,115.55 = 1,839.61/x
3. Step 3: Cross multiply
   2,259.90x = 3,115.55 × 1,839.61
4. Step 4: Simplify right side
   2,259.90x = 5,731,372.16
5. Step 5: Solve for x
   x = 5,731,372.16/2,259.90
6. Step 6: Final answer
   x = 2,536.12