Finding the Fourth Proportional to 2,389.11, 3,298.50 and 1,642.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.11 : 3,298.50 = 1,642.83 : x
2. Step 2: Convert to fraction form
   2,389.11/3,298.50 = 1,642.83/x
3. Step 3: Cross multiply
   2,389.11x = 3,298.50 × 1,642.83
4. Step 4: Simplify right side
   2,389.11x = 5,418,874.76
5. Step 5: Solve for x
   x = 5,418,874.76/2,389.11
6. Step 6: Final answer
   x = 2,268.16