Finding the Fourth Proportional to 2,431.05, 3,355.17 and 1,382.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.05 : 3,355.17 = 1,382.91 : x
2. Step 2: Convert to fraction form
   2,431.05/3,355.17 = 1,382.91/x
3. Step 3: Cross multiply
   2,431.05x = 3,355.17 × 1,382.91
4. Step 4: Simplify right side
   2,431.05x = 4,639,874.45
5. Step 5: Solve for x
   x = 4,639,874.45/2,431.05
6. Step 6: Final answer
   x = 1,908.59