Finding the Fourth Proportional to 2,609.98, 3,601.76 and 1,431.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.98 : 3,601.76 = 1,431.06 : x
2. Step 2: Convert to fraction form
   2,609.98/3,601.76 = 1,431.06/x
3. Step 3: Cross multiply
   2,609.98x = 3,601.76 × 1,431.06
4. Step 4: Simplify right side
   2,609.98x = 5,154,334.67
5. Step 5: Solve for x
   x = 5,154,334.67/2,609.98
6. Step 6: Final answer
   x = 1,974.86