Finding the Fourth Proportional to 2,086.43, 3,126.60 and 1,427.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.43 : 3,126.60 = 1,427.90 : x
2. Step 2: Convert to fraction form
   2,086.43/3,126.60 = 1,427.90/x
3. Step 3: Cross multiply
   2,086.43x = 3,126.60 × 1,427.90
4. Step 4: Simplify right side
   2,086.43x = 4,464,456.51
5. Step 5: Solve for x
   x = 4,464,456.51/2,086.43
6. Step 6: Final answer
   x = 2,139.76