Finding the Fourth Proportional to 2,650.86, 3,977.37 and 1,092.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,650.86 : 3,977.37 = 1,092.15 : x
2. Step 2: Convert to fraction form
   2,650.86/3,977.37 = 1,092.15/x
3. Step 3: Cross multiply
   2,650.86x = 3,977.37 × 1,092.15
4. Step 4: Simplify right side
   2,650.86x = 4,343,884.65
5. Step 5: Solve for x
   x = 4,343,884.65/2,650.86
6. Step 6: Final answer
   x = 1,638.67