Finding the Fourth Proportional to 1,671.40, 2,305.15 and 1,559.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,671.40 : 2,305.15 = 1,559.62 : x
2. Step 2: Convert to fraction form
   1,671.40/2,305.15 = 1,559.62/x
3. Step 3: Cross multiply
   1,671.40x = 2,305.15 × 1,559.62
4. Step 4: Simplify right side
   1,671.40x = 3,595,158.04
5. Step 5: Solve for x
   x = 3,595,158.04/1,671.40
6. Step 6: Final answer
   x = 2,150.99