Finding the Fourth Proportional to 3,139.32, 4,709.01 and 830.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.32 : 4,709.01 = 830.82 : x
2. Step 2: Convert to fraction form
   3,139.32/4,709.01 = 830.82/x
3. Step 3: Cross multiply
   3,139.32x = 4,709.01 × 830.82
4. Step 4: Simplify right side
   3,139.32x = 3,912,339.69
5. Step 5: Solve for x
   x = 3,912,339.69/3,139.32
6. Step 6: Final answer
   x = 1,246.24