Finding the Fourth Proportional to 2,109.72, 3,158.46 and 1,591.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.72 : 3,158.46 = 1,591.86 : x
2. Step 2: Convert to fraction form
   2,109.72/3,158.46 = 1,591.86/x
3. Step 3: Cross multiply
   2,109.72x = 3,158.46 × 1,591.86
4. Step 4: Simplify right side
   2,109.72x = 5,027,826.14
5. Step 5: Solve for x
   x = 5,027,826.14/2,109.72
6. Step 6: Final answer
   x = 2,383.17