Finding the Fourth Proportional to 2,091.22, 2,889.27 and 1,779.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.22 : 2,889.27 = 1,779.77 : x
2. Step 2: Convert to fraction form
   2,091.22/2,889.27 = 1,779.77/x
3. Step 3: Cross multiply
   2,091.22x = 2,889.27 × 1,779.77
4. Step 4: Simplify right side
   2,091.22x = 5,142,243.29
5. Step 5: Solve for x
   x = 5,142,243.29/2,091.22
6. Step 6: Final answer
   x = 2,458.97