Finding the Fourth Proportional to 2,290.66, 3,158.05 and 1,820.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.66 : 3,158.05 = 1,820.11 : x
2. Step 2: Convert to fraction form
   2,290.66/3,158.05 = 1,820.11/x
3. Step 3: Cross multiply
   2,290.66x = 3,158.05 × 1,820.11
4. Step 4: Simplify right side
   2,290.66x = 5,747,998.39
5. Step 5: Solve for x
   x = 5,747,998.39/2,290.66
6. Step 6: Final answer
   x = 2,509.32