Finding the Fourth Proportional to 2,587.81, 3,877.86 and 1,126.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.81 : 3,877.86 = 1,126.16 : x
2. Step 2: Convert to fraction form
   2,587.81/3,877.86 = 1,126.16/x
3. Step 3: Cross multiply
   2,587.81x = 3,877.86 × 1,126.16
4. Step 4: Simplify right side
   2,587.81x = 4,367,090.82
5. Step 5: Solve for x
   x = 4,367,090.82/2,587.81
6. Step 6: Final answer
   x = 1,687.56