Finding the Fourth Proportional to 2,580.21, 3,560.70 and 1,401.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.21 : 3,560.70 = 1,401.30 : x
2. Step 2: Convert to fraction form
   2,580.21/3,560.70 = 1,401.30/x
3. Step 3: Cross multiply
   2,580.21x = 3,560.70 × 1,401.30
4. Step 4: Simplify right side
   2,580.21x = 4,989,608.91
5. Step 5: Solve for x
   x = 4,989,608.91/2,580.21
6. Step 6: Final answer
   x = 1,933.80