Finding the Fourth Proportional to 2,086.56, 3,131.87 and 1,113.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.56 : 3,131.87 = 1,113.35 : x
2. Step 2: Convert to fraction form
   2,086.56/3,131.87 = 1,113.35/x
3. Step 3: Cross multiply
   2,086.56x = 3,131.87 × 1,113.35
4. Step 4: Simplify right side
   2,086.56x = 3,486,846.24
5. Step 5: Solve for x
   x = 3,486,846.24/2,086.56
6. Step 6: Final answer
   x = 1,671.10