Finding the Fourth Proportional to 2,489.72, 3,434.81 and 1,545.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,489.72 : 3,434.81 = 1,545.17 : x
2. Step 2: Convert to fraction form
   2,489.72/3,434.81 = 1,545.17/x
3. Step 3: Cross multiply
   2,489.72x = 3,434.81 × 1,545.17
4. Step 4: Simplify right side
   2,489.72x = 5,307,340.47
5. Step 5: Solve for x
   x = 5,307,340.47/2,489.72
6. Step 6: Final answer
   x = 2,131.71