Finding the Fourth Proportional to 2,650.10, 3,976.50 and 1,091.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,650.10 : 3,976.50 = 1,091.30 : x
2. Step 2: Convert to fraction form
   2,650.10/3,976.50 = 1,091.30/x
3. Step 3: Cross multiply
   2,650.10x = 3,976.50 × 1,091.30
4. Step 4: Simplify right side
   2,650.10x = 4,339,554.45
5. Step 5: Solve for x
   x = 4,339,554.45/2,650.10
6. Step 6: Final answer
   x = 1,637.51