Finding the Fourth Proportional to 2,641.55, 3,963.15 and 792.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.55 : 3,963.15 = 792.72 : x
2. Step 2: Convert to fraction form
   2,641.55/3,963.15 = 792.72/x
3. Step 3: Cross multiply
   2,641.55x = 3,963.15 × 792.72
4. Step 4: Simplify right side
   2,641.55x = 3,141,668.27
5. Step 5: Solve for x
   x = 3,141,668.27/2,641.55
6. Step 6: Final answer
   x = 1,189.33