Finding the Fourth Proportional to 2,609.34, 3,914.22 and 830.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.34 : 3,914.22 = 830.18 : x
2. Step 2: Convert to fraction form
   2,609.34/3,914.22 = 830.18/x
3. Step 3: Cross multiply
   2,609.34x = 3,914.22 × 830.18
4. Step 4: Simplify right side
   2,609.34x = 3,249,507.16
5. Step 5: Solve for x
   x = 3,249,507.16/2,609.34
6. Step 6: Final answer
   x = 1,245.34