Finding the Fourth Proportional to 1,455.50, 2,180.46 and 1,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,455.50 : 2,180.46 = 1,145.72 : x
2. Step 2: Convert to fraction form
   1,455.50/2,180.46 = 1,145.72/x
3. Step 3: Cross multiply
   1,455.50x = 2,180.46 × 1,145.72
4. Step 4: Simplify right side
   1,455.50x = 2,498,196.63
5. Step 5: Solve for x
   x = 2,498,196.63/1,455.50
6. Step 6: Final answer
   x = 1,716.38