Finding the Fourth Proportional to 2,453.45, 3,385.79 and 1,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.45 : 3,385.79 = 1,405.50 : x
2. Step 2: Convert to fraction form
   2,453.45/3,385.79 = 1,405.50/x
3. Step 3: Cross multiply
   2,453.45x = 3,385.79 × 1,405.50
4. Step 4: Simplify right side
   2,453.45x = 4,758,720.82
5. Step 5: Solve for x
   x = 4,758,720.82/2,453.45
6. Step 6: Final answer
   x = 1,939.61