Finding the Fourth Proportional to 2,145.54, 3,218.72 and 1,453.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.54 : 3,218.72 = 1,453.80 : x
2. Step 2: Convert to fraction form
   2,145.54/3,218.72 = 1,453.80/x
3. Step 3: Cross multiply
   2,145.54x = 3,218.72 × 1,453.80
4. Step 4: Simplify right side
   2,145.54x = 4,679,375.14
5. Step 5: Solve for x
   x = 4,679,375.14/2,145.54
6. Step 6: Final answer
   x = 2,180.98