Finding the Fourth Proportional to 2,640.72, 3,963 and 1,181.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.72 : 3,963 = 1,181.52 : x
2. Step 2: Convert to fraction form
   2,640.72/3,963 = 1,181.52/x
3. Step 3: Cross multiply
   2,640.72x = 3,963 × 1,181.52
4. Step 4: Simplify right side
   2,640.72x = 4,682,363.76
5. Step 5: Solve for x
   x = 4,682,363.76/2,640.72
6. Step 6: Final answer
   x = 1,773.14