Finding the Fourth Proportional to 2,598.65, 3,898 and 1,211.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,598.65 : 3,898 = 1,211.59 : x
2. Step 2: Convert to fraction form
   2,598.65/3,898 = 1,211.59/x
3. Step 3: Cross multiply
   2,598.65x = 3,898 × 1,211.59
4. Step 4: Simplify right side
   2,598.65x = 4,722,758.33
5. Step 5: Solve for x
   x = 4,722,758.33/2,598.65
6. Step 6: Final answer
   x = 1,817.39