Finding the Fourth Proportional to 2,086.72, 3,131.50 and 1,113.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.72 : 3,131.50 = 1,113.52 : x
2. Step 2: Convert to fraction form
   2,086.72/3,131.50 = 1,113.52/x
3. Step 3: Cross multiply
   2,086.72x = 3,131.50 × 1,113.52
4. Step 4: Simplify right side
   2,086.72x = 3,486,987.88
5. Step 5: Solve for x
   x = 3,486,987.88/2,086.72
6. Step 6: Final answer
   x = 1,671.04