Finding the Fourth Proportional to 1,306.82, 1,956.72 and 1,100.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,306.82 : 1,956.72 = 1,100.90 : x
2. Step 2: Convert to fraction form
   1,306.82/1,956.72 = 1,100.90/x
3. Step 3: Cross multiply
   1,306.82x = 1,956.72 × 1,100.90
4. Step 4: Simplify right side
   1,306.82x = 2,154,153.05
5. Step 5: Solve for x
   x = 2,154,153.05/1,306.82
6. Step 6: Final answer
   x = 1,648.39