Finding the Fourth Proportional to 2,453.25, 3,385.49 and 1,405.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.25 : 3,385.49 = 1,405.32 : x
2. Step 2: Convert to fraction form
   2,453.25/3,385.49 = 1,405.32/x
3. Step 3: Cross multiply
   2,453.25x = 3,385.49 × 1,405.32
4. Step 4: Simplify right side
   2,453.25x = 4,757,689.78
5. Step 5: Solve for x
   x = 4,757,689.78/2,453.25
6. Step 6: Final answer
   x = 1,939.34