Finding the Fourth Proportional to 2,580.90, 3,561.60 and 1,401.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.90 : 3,561.60 = 1,401.99 : x
2. Step 2: Convert to fraction form
   2,580.90/3,561.60 = 1,401.99/x
3. Step 3: Cross multiply
   2,580.90x = 3,561.60 × 1,401.99
4. Step 4: Simplify right side
   2,580.90x = 4,993,327.58
5. Step 5: Solve for x
   x = 4,993,327.58/2,580.90
6. Step 6: Final answer
   x = 1,934.72