Finding the Fourth Proportional to 2,086.08, 2,878.30 and 1,424.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.08 : 2,878.30 = 1,424.31 : x
2. Step 2: Convert to fraction form
   2,086.08/2,878.30 = 1,424.31/x
3. Step 3: Cross multiply
   2,086.08x = 2,878.30 × 1,424.31
4. Step 4: Simplify right side
   2,086.08x = 4,099,573.52
5. Step 5: Solve for x
   x = 4,099,573.52/2,086.08
6. Step 6: Final answer
   x = 1,965.21