Finding the Fourth Proportional to 2,057.86, 3,087.31 and 1,181.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.86 : 3,087.31 = 1,181.35 : x
2. Step 2: Convert to fraction form
   2,057.86/3,087.31 = 1,181.35/x
3. Step 3: Cross multiply
   2,057.86x = 3,087.31 × 1,181.35
4. Step 4: Simplify right side
   2,057.86x = 3,647,193.67
5. Step 5: Solve for x
   x = 3,647,193.67/2,057.86
6. Step 6: Final answer
   x = 1,772.32