Finding the Fourth Proportional to 1,641.67, 2,264.79 and 1,081.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.67 : 2,264.79 = 1,081.42 : x
2. Step 2: Convert to fraction form
   1,641.67/2,264.79 = 1,081.42/x
3. Step 3: Cross multiply
   1,641.67x = 2,264.79 × 1,081.42
4. Step 4: Simplify right side
   1,641.67x = 2,449,189.20
5. Step 5: Solve for x
   x = 2,449,189.20/1,641.67
6. Step 6: Final answer
   x = 1,491.89