Finding the Fourth Proportional to 2,106.61, 2,905.37 and 1,581.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.61 : 2,905.37 = 1,581.73 : x
2. Step 2: Convert to fraction form
   2,106.61/2,905.37 = 1,581.73/x
3. Step 3: Cross multiply
   2,106.61x = 2,905.37 × 1,581.73
4. Step 4: Simplify right side
   2,106.61x = 4,595,501.65
5. Step 5: Solve for x
   x = 4,595,501.65/2,106.61
6. Step 6: Final answer
   x = 2,181.47