Finding the Fourth Proportional to 2,090.21, 2,884.61 and 1,158.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.21 : 2,884.61 = 1,158.71 : x
2. Step 2: Convert to fraction form
   2,090.21/2,884.61 = 1,158.71/x
3. Step 3: Cross multiply
   2,090.21x = 2,884.61 × 1,158.71
4. Step 4: Simplify right side
   2,090.21x = 3,342,414.93
5. Step 5: Solve for x
   x = 3,342,414.93/2,090.21
6. Step 6: Final answer
   x = 1,599.08