Finding the Fourth Proportional to 5,443.55, 8,168.97 and 1,980.80

Step by Step Solution

1. Step 1: Write the proportion equation
   5,443.55 : 8,168.97 = 1,980.80 : x
2. Step 2: Convert to fraction form
   5,443.55/8,168.97 = 1,980.80/x
3. Step 3: Cross multiply
   5,443.55x = 8,168.97 × 1,980.80
4. Step 4: Simplify right side
   5,443.55x = 16,181,045.03
5. Step 5: Solve for x
   x = 16,181,045.03/5,443.55
6. Step 6: Final answer
   x = 2,972.52