Finding the Fourth Proportional to 2,489.73, 3,435.91 and 1,370.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,489.73 : 3,435.91 = 1,370.72 : x
2. Step 2: Convert to fraction form
   2,489.73/3,435.91 = 1,370.72/x
3. Step 3: Cross multiply
   2,489.73x = 3,435.91 × 1,370.72
4. Step 4: Simplify right side
   2,489.73x = 4,709,670.56
5. Step 5: Solve for x
   x = 4,709,670.56/2,489.73
6. Step 6: Final answer
   x = 1,891.64