Finding the Fourth Proportional to 2,085.99, 3,130.29 and 1,112.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.99 : 3,130.29 = 1,112.73 : x
2. Step 2: Convert to fraction form
   2,085.99/3,130.29 = 1,112.73/x
3. Step 3: Cross multiply
   2,085.99x = 3,130.29 × 1,112.73
4. Step 4: Simplify right side
   2,085.99x = 3,483,167.59
5. Step 5: Solve for x
   x = 3,483,167.59/2,085.99
6. Step 6: Final answer
   x = 1,669.79