Finding the Fourth Proportional to 2,453.72, 3,386.21 and 1,405.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.72 : 3,386.21 = 1,405.98 : x
2. Step 2: Convert to fraction form
   2,453.72/3,386.21 = 1,405.98/x
3. Step 3: Cross multiply
   2,453.72x = 3,386.21 × 1,405.98
4. Step 4: Simplify right side
   2,453.72x = 4,760,947.05
5. Step 5: Solve for x
   x = 4,760,947.05/2,453.72
6. Step 6: Final answer
   x = 1,940.30