Finding the Fourth Proportional to 2,453.55, 3,385.76 and 1,405.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.55 : 3,385.76 = 1,405.59 : x
2. Step 2: Convert to fraction form
   2,453.55/3,385.76 = 1,405.59/x
3. Step 3: Cross multiply
   2,453.55x = 3,385.76 × 1,405.59
4. Step 4: Simplify right side
   2,453.55x = 4,758,983.37
5. Step 5: Solve for x
   x = 4,758,983.37/2,453.55
6. Step 6: Final answer
   x = 1,939.63