Finding the Fourth Proportional to 1,611.29, 2,411.46 and 1,247.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.29 : 2,411.46 = 1,247.71 : x
2. Step 2: Convert to fraction form
   1,611.29/2,411.46 = 1,247.71/x
3. Step 3: Cross multiply
   1,611.29x = 2,411.46 × 1,247.71
4. Step 4: Simplify right side
   1,611.29x = 3,008,802.76
5. Step 5: Solve for x
   x = 3,008,802.76/1,611.29
6. Step 6: Final answer
   x = 1,867.33