Finding the Fourth Proportional to 2,940.40, 4,410.51 and 1,091.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.40 : 4,410.51 = 1,091.89 : x
2. Step 2: Convert to fraction form
   2,940.40/4,410.51 = 1,091.89/x
3. Step 3: Cross multiply
   2,940.40x = 4,410.51 × 1,091.89
4. Step 4: Simplify right side
   2,940.40x = 4,815,791.76
5. Step 5: Solve for x
   x = 4,815,791.76/2,940.40
6. Step 6: Final answer
   x = 1,637.80