Finding the Fourth Proportional to 2,554.47, 3,828.50 and 1,091.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,554.47 : 3,828.50 = 1,091.91 : x
2. Step 2: Convert to fraction form
   2,554.47/3,828.50 = 1,091.91/x
3. Step 3: Cross multiply
   2,554.47x = 3,828.50 × 1,091.91
4. Step 4: Simplify right side
   2,554.47x = 4,180,361.02
5. Step 5: Solve for x
   x = 4,180,361.02/2,554.47
6. Step 6: Final answer
   x = 1,636.49