Finding the Fourth Proportional to 2,453.58, 3,385.53 and 1,405.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.58 : 3,385.53 = 1,405.71 : x
2. Step 2: Convert to fraction form
   2,453.58/3,385.53 = 1,405.71/x
3. Step 3: Cross multiply
   2,453.58x = 3,385.53 × 1,405.71
4. Step 4: Simplify right side
   2,453.58x = 4,759,073.38
5. Step 5: Solve for x
   x = 4,759,073.38/2,453.58
6. Step 6: Final answer
   x = 1,939.64