Finding the Fourth Proportional to 2,641.59, 3,962.88 and 1,180.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.59 : 3,962.88 = 1,180.80 : x
2. Step 2: Convert to fraction form
   2,641.59/3,962.88 = 1,180.80/x
3. Step 3: Cross multiply
   2,641.59x = 3,962.88 × 1,180.80
4. Step 4: Simplify right side
   2,641.59x = 4,679,368.70
5. Step 5: Solve for x
   x = 4,679,368.70/2,641.59
6. Step 6: Final answer
   x = 1,771.42