Finding the Fourth Proportional to 2,453.55, 3,385.89 and 1,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.55 : 3,385.89 = 1,405.50 : x
2. Step 2: Convert to fraction form
   2,453.55/3,385.89 = 1,405.50/x
3. Step 3: Cross multiply
   2,453.55x = 3,385.89 × 1,405.50
4. Step 4: Simplify right side
   2,453.55x = 4,758,868.40
5. Step 5: Solve for x
   x = 4,758,868.40/2,453.55
6. Step 6: Final answer
   x = 1,939.58