Finding the Fourth Proportional to 1,456.79, 2,185.38 and 483.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.79 : 2,185.38 = 483.57 : x
2. Step 2: Convert to fraction form
   1,456.79/2,185.38 = 483.57/x
3. Step 3: Cross multiply
   1,456.79x = 2,185.38 × 483.57
4. Step 4: Simplify right side
   1,456.79x = 1,056,784.21
5. Step 5: Solve for x
   x = 1,056,784.21/1,456.79
6. Step 6: Final answer
   x = 725.42