Finding the Fourth Proportional to 1,978.44, 2,729.81 and 1,181.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.44 : 2,729.81 = 1,181.55 : x
2. Step 2: Convert to fraction form
   1,978.44/2,729.81 = 1,181.55/x
3. Step 3: Cross multiply
   1,978.44x = 2,729.81 × 1,181.55
4. Step 4: Simplify right side
   1,978.44x = 3,225,401.10
5. Step 5: Solve for x
   x = 3,225,401.10/1,978.44
6. Step 6: Final answer
   x = 1,630.27