Finding the Fourth Proportional to 2,573.62, 3,860.33 and 1,091.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.62 : 3,860.33 = 1,091.89 : x
2. Step 2: Convert to fraction form
   2,573.62/3,860.33 = 1,091.89/x
3. Step 3: Cross multiply
   2,573.62x = 3,860.33 × 1,091.89
4. Step 4: Simplify right side
   2,573.62x = 4,215,039.15
5. Step 5: Solve for x
   x = 4,215,039.15/2,573.62
6. Step 6: Final answer
   x = 1,637.79