Finding the Fourth Proportional to 1,986.72, 2,741.56 and 1,102.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.72 : 2,741.56 = 1,102.49 : x
2. Step 2: Convert to fraction form
   1,986.72/2,741.56 = 1,102.49/x
3. Step 3: Cross multiply
   1,986.72x = 2,741.56 × 1,102.49
4. Step 4: Simplify right side
   1,986.72x = 3,022,542.48
5. Step 5: Solve for x
   x = 3,022,542.48/1,986.72
6. Step 6: Final answer
   x = 1,521.37