Finding the Fourth Proportional to 1,985.18, 2,739.84 and 1,101.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.18 : 2,739.84 = 1,101.20 : x
2. Step 2: Convert to fraction form
   1,985.18/2,739.84 = 1,101.20/x
3. Step 3: Cross multiply
   1,985.18x = 2,739.84 × 1,101.20
4. Step 4: Simplify right side
   1,985.18x = 3,017,111.81
5. Step 5: Solve for x
   x = 3,017,111.81/1,985.18
6. Step 6: Final answer
   x = 1,519.82