Finding the Fourth Proportional to 2,641.98, 3,645.50 and 1,580.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.98 : 3,645.50 = 1,580.18 : x
2. Step 2: Convert to fraction form
   2,641.98/3,645.50 = 1,580.18/x
3. Step 3: Cross multiply
   2,641.98x = 3,645.50 × 1,580.18
4. Step 4: Simplify right side
   2,641.98x = 5,760,520.06
5. Step 5: Solve for x
   x = 5,760,520.06/2,641.98
6. Step 6: Final answer
   x = 2,180.38