Finding the Fourth Proportional to 1,641.82, 2,265.81 and 1,169.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.82 : 2,265.81 = 1,169.86 : x
2. Step 2: Convert to fraction form
   1,641.82/2,265.81 = 1,169.86/x
3. Step 3: Cross multiply
   1,641.82x = 2,265.81 × 1,169.86
4. Step 4: Simplify right side
   1,641.82x = 2,650,680.49
5. Step 5: Solve for x
   x = 2,650,680.49/1,641.82
6. Step 6: Final answer
   x = 1,614.48