Finding the Fourth Proportional to 2,580.90, 3,561.72 and 1,461.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.90 : 3,561.72 = 1,461.90 : x
2. Step 2: Convert to fraction form
   2,580.90/3,561.72 = 1,461.90/x
3. Step 3: Cross multiply
   2,580.90x = 3,561.72 × 1,461.90
4. Step 4: Simplify right side
   2,580.90x = 5,206,878.47
5. Step 5: Solve for x
   x = 5,206,878.47/2,580.90
6. Step 6: Final answer
   x = 2,017.47