Finding the Fourth Proportional to 2,085.99, 3,131.20 and 1,163.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.99 : 3,131.20 = 1,163.34 : x
2. Step 2: Convert to fraction form
   2,085.99/3,131.20 = 1,163.34/x
3. Step 3: Cross multiply
   2,085.99x = 3,131.20 × 1,163.34
4. Step 4: Simplify right side
   2,085.99x = 3,642,651.66
5. Step 5: Solve for x
   x = 3,642,651.66/2,085.99
6. Step 6: Final answer
   x = 1,746.25