Finding the Fourth Proportional to 2,940.78, 4,053.33 and 1,891.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.78 : 4,053.33 = 1,891.02 : x
2. Step 2: Convert to fraction form
   2,940.78/4,053.33 = 1,891.02/x
3. Step 3: Cross multiply
   2,940.78x = 4,053.33 × 1,891.02
4. Step 4: Simplify right side
   2,940.78x = 7,664,928.10
5. Step 5: Solve for x
   x = 7,664,928.10/2,940.78
6. Step 6: Final answer
   x = 2,606.43