Finding the Fourth Proportional to 2,641.72, 3,962.10 and 792.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.72 : 3,962.10 = 792.40 : x
2. Step 2: Convert to fraction form
   2,641.72/3,962.10 = 792.40/x
3. Step 3: Cross multiply
   2,641.72x = 3,962.10 × 792.40
4. Step 4: Simplify right side
   2,641.72x = 3,139,568.04
5. Step 5: Solve for x
   x = 3,139,568.04/2,641.72
6. Step 6: Final answer
   x = 1,188.46