Finding the Fourth Proportional to 2,580.79, 3,561.45 and 1,401.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.79 : 3,561.45 = 1,401.85 : x
2. Step 2: Convert to fraction form
   2,580.79/3,561.45 = 1,401.85/x
3. Step 3: Cross multiply
   2,580.79x = 3,561.45 × 1,401.85
4. Step 4: Simplify right side
   2,580.79x = 4,992,618.68
5. Step 5: Solve for x
   x = 4,992,618.68/2,580.79
6. Step 6: Final answer
   x = 1,934.53