Finding the Fourth Proportional to 2,311.48, 3,466.32 and 830.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.48 : 3,466.32 = 830.30 : x
2. Step 2: Convert to fraction form
   2,311.48/3,466.32 = 830.30/x
3. Step 3: Cross multiply
   2,311.48x = 3,466.32 × 830.30
4. Step 4: Simplify right side
   2,311.48x = 2,878,085.50
5. Step 5: Solve for x
   x = 2,878,085.50/2,311.48
6. Step 6: Final answer
   x = 1,245.13