Finding the Fourth Proportional to 1,644.42, 2,270.78 and 1,529.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.42 : 2,270.78 = 1,529.61 : x
2. Step 2: Convert to fraction form
   1,644.42/2,270.78 = 1,529.61/x
3. Step 3: Cross multiply
   1,644.42x = 2,270.78 × 1,529.61
4. Step 4: Simplify right side
   1,644.42x = 3,473,407.80
5. Step 5: Solve for x
   x = 3,473,407.80/1,644.42
6. Step 6: Final answer
   x = 2,112.24