Finding the Fourth Proportional to 3,805.70, 5,706.72 and 1,340.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,805.70 : 5,706.72 = 1,340.69 : x
2. Step 2: Convert to fraction form
   3,805.70/5,706.72 = 1,340.69/x
3. Step 3: Cross multiply
   3,805.70x = 5,706.72 × 1,340.69
4. Step 4: Simplify right side
   3,805.70x = 7,650,913.90
5. Step 5: Solve for x
   x = 7,650,913.90/3,805.70
6. Step 6: Final answer
   x = 2,010.39