Finding the Fourth Proportional to 2,180.61, 3,009.17 and 1,284.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.61 : 3,009.17 = 1,284.44 : x
2. Step 2: Convert to fraction form
   2,180.61/3,009.17 = 1,284.44/x
3. Step 3: Cross multiply
   2,180.61x = 3,009.17 × 1,284.44
4. Step 4: Simplify right side
   2,180.61x = 3,865,086.48
5. Step 5: Solve for x
   x = 3,865,086.48/2,180.61
6. Step 6: Final answer
   x = 1,772.48