Finding the Fourth Proportional to 3,664.12, 5,055.78 and 2,091.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.12 : 5,055.78 = 2,091.88 : x
2. Step 2: Convert to fraction form
   3,664.12/5,055.78 = 2,091.88/x
3. Step 3: Cross multiply
   3,664.12x = 5,055.78 × 2,091.88
4. Step 4: Simplify right side
   3,664.12x = 10,576,085.07
5. Step 5: Solve for x
   x = 10,576,085.07/3,664.12
6. Step 6: Final answer
   x = 2,886.39