Finding the Fourth Proportional to 2,587.46, 3,878.43 and 1,026.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.46 : 3,878.43 = 1,026.79 : x
2. Step 2: Convert to fraction form
   2,587.46/3,878.43 = 1,026.79/x
3. Step 3: Cross multiply
   2,587.46x = 3,878.43 × 1,026.79
4. Step 4: Simplify right side
   2,587.46x = 3,982,347.19
5. Step 5: Solve for x
   x = 3,982,347.19/2,587.46
6. Step 6: Final answer
   x = 1,539.09