Finding the Fourth Proportional to 1,985.10, 2,739.39 and 1,100.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.10 : 2,739.39 = 1,100.89 : x
2. Step 2: Convert to fraction form
   1,985.10/2,739.39 = 1,100.89/x
3. Step 3: Cross multiply
   1,985.10x = 2,739.39 × 1,100.89
4. Step 4: Simplify right side
   1,985.10x = 3,015,767.06
5. Step 5: Solve for x
   x = 3,015,767.06/1,985.10
6. Step 6: Final answer
   x = 1,519.20