Finding the Fourth Proportional to 1,986.89, 2,741.94 and 1,102.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.89 : 2,741.94 = 1,102.78 : x
2. Step 2: Convert to fraction form
   1,986.89/2,741.94 = 1,102.78/x
3. Step 3: Cross multiply
   1,986.89x = 2,741.94 × 1,102.78
4. Step 4: Simplify right side
   1,986.89x = 3,023,737.37
5. Step 5: Solve for x
   x = 3,023,737.37/1,986.89
6. Step 6: Final answer
   x = 1,521.84