Finding the Fourth Proportional to 2,309.63, 3,464.82 and 1,139.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.63 : 3,464.82 = 1,139.69 : x
2. Step 2: Convert to fraction form
   2,309.63/3,464.82 = 1,139.69/x
3. Step 3: Cross multiply
   2,309.63x = 3,464.82 × 1,139.69
4. Step 4: Simplify right side
   2,309.63x = 3,948,803.38
5. Step 5: Solve for x
   x = 3,948,803.38/2,309.63
6. Step 6: Final answer
   x = 1,709.72