Finding the Fourth Proportional to 2,099.89, 2,897.64 and 1,155.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.89 : 2,897.64 = 1,155.72 : x
2. Step 2: Convert to fraction form
   2,099.89/2,897.64 = 1,155.72/x
3. Step 3: Cross multiply
   2,099.89x = 2,897.64 × 1,155.72
4. Step 4: Simplify right side
   2,099.89x = 3,348,855.07
5. Step 5: Solve for x
   x = 3,348,855.07/2,099.89
6. Step 6: Final answer
   x = 1,594.78