Finding the Fourth Proportional to 1,767.42, 2,644.47 and 1,587.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,767.42 : 2,644.47 = 1,587.78 : x
2. Step 2: Convert to fraction form
   1,767.42/2,644.47 = 1,587.78/x
3. Step 3: Cross multiply
   1,767.42x = 2,644.47 × 1,587.78
4. Step 4: Simplify right side
   1,767.42x = 4,198,836.58
5. Step 5: Solve for x
   x = 4,198,836.58/1,767.42
6. Step 6: Final answer
   x = 2,375.69