Finding the Fourth Proportional to 2,680.29, 3,698.60 and 1,561.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.29 : 3,698.60 = 1,561.18 : x
2. Step 2: Convert to fraction form
   2,680.29/3,698.60 = 1,561.18/x
3. Step 3: Cross multiply
   2,680.29x = 3,698.60 × 1,561.18
4. Step 4: Simplify right side
   2,680.29x = 5,774,180.35
5. Step 5: Solve for x
   x = 5,774,180.35/2,680.29
6. Step 6: Final answer
   x = 2,154.31