Finding the Fourth Proportional to 1,989.99, 2,746.17 and 1,105.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.99 : 2,746.17 = 1,105.79 : x
2. Step 2: Convert to fraction form
   1,989.99/2,746.17 = 1,105.79/x
3. Step 3: Cross multiply
   1,989.99x = 2,746.17 × 1,105.79
4. Step 4: Simplify right side
   1,989.99x = 3,036,673.59
5. Step 5: Solve for x
   x = 3,036,673.59/1,989.99
6. Step 6: Final answer
   x = 1,525.97