Finding the Fourth Proportional to 1,990.03, 2,746.20 and 1,105.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.03 : 2,746.20 = 1,105.78 : x
2. Step 2: Convert to fraction form
   1,990.03/2,746.20 = 1,105.78/x
3. Step 3: Cross multiply
   1,990.03x = 2,746.20 × 1,105.78
4. Step 4: Simplify right side
   1,990.03x = 3,036,693.04
5. Step 5: Solve for x
   x = 3,036,693.04/1,990.03
6. Step 6: Final answer
   x = 1,525.95