Finding the Fourth Proportional to 1,120.91, 1,676.56 and 1,091.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.91 : 1,676.56 = 1,091.05 : x
2. Step 2: Convert to fraction form
   1,120.91/1,676.56 = 1,091.05/x
3. Step 3: Cross multiply
   1,120.91x = 1,676.56 × 1,091.05
4. Step 4: Simplify right side
   1,120.91x = 1,829,210.79
5. Step 5: Solve for x
   x = 1,829,210.79/1,120.91
6. Step 6: Final answer
   x = 1,631.90