Finding the Fourth Proportional to 3,427.59, 5,141.33 and 830.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,427.59 : 5,141.33 = 830.51 : x
2. Step 2: Convert to fraction form
   3,427.59/5,141.33 = 830.51/x
3. Step 3: Cross multiply
   3,427.59x = 5,141.33 × 830.51
4. Step 4: Simplify right side
   3,427.59x = 4,269,898.20
5. Step 5: Solve for x
   x = 4,269,898.20/3,427.59
6. Step 6: Final answer
   x = 1,245.75