Finding the Fourth Proportional to 2,580, 3,560.52 and 1,445.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580 : 3,560.52 = 1,445.78 : x
2. Step 2: Convert to fraction form
   2,580/3,560.52 = 1,445.78/x
3. Step 3: Cross multiply
   2,580x = 3,560.52 × 1,445.78
4. Step 4: Simplify right side
   2,580x = 5,147,728.61
5. Step 5: Solve for x
   x = 5,147,728.61/2,580
6. Step 6: Final answer
   x = 1,995.24