Finding the Fourth Proportional to 2,641.76, 3,962.85 and 792.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.76 : 3,962.85 = 792.74 : x
2. Step 2: Convert to fraction form
   2,641.76/3,962.85 = 792.74/x
3. Step 3: Cross multiply
   2,641.76x = 3,962.85 × 792.74
4. Step 4: Simplify right side
   2,641.76x = 3,141,519.62
5. Step 5: Solve for x
   x = 3,141,519.62/2,641.76
6. Step 6: Final answer
   x = 1,189.18