Finding the Fourth Proportional to 3,427.71, 5,141.52 and 830.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,427.71 : 5,141.52 = 830.67 : x
2. Step 2: Convert to fraction form
   3,427.71/5,141.52 = 830.67/x
3. Step 3: Cross multiply
   3,427.71x = 5,141.52 × 830.67
4. Step 4: Simplify right side
   3,427.71x = 4,270,906.42
5. Step 5: Solve for x
   x = 4,270,906.42/3,427.71
6. Step 6: Final answer
   x = 1,245.99