Finding the Fourth Proportional to 2,091.89, 2,885.13 and 1,778.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.89 : 2,885.13 = 1,778.19 : x
2. Step 2: Convert to fraction form
   2,091.89/2,885.13 = 1,778.19/x
3. Step 3: Cross multiply
   2,091.89x = 2,885.13 × 1,778.19
4. Step 4: Simplify right side
   2,091.89x = 5,130,309.31
5. Step 5: Solve for x
   x = 5,130,309.31/2,091.89
6. Step 6: Final answer
   x = 2,452.48