Finding the Fourth Proportional to 2,580.57, 3,561.06 and 1,401.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.57 : 3,561.06 = 1,401.60 : x
2. Step 2: Convert to fraction form
   2,580.57/3,561.06 = 1,401.60/x
3. Step 3: Cross multiply
   2,580.57x = 3,561.06 × 1,401.60
4. Step 4: Simplify right side
   2,580.57x = 4,991,181.70
5. Step 5: Solve for x
   x = 4,991,181.70/2,580.57
6. Step 6: Final answer
   x = 1,934.14