Finding the Fourth Proportional to 2,740.63, 4,111.60 and 792.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.63 : 4,111.60 = 792.78 : x
2. Step 2: Convert to fraction form
   2,740.63/4,111.60 = 792.78/x
3. Step 3: Cross multiply
   2,740.63x = 4,111.60 × 792.78
4. Step 4: Simplify right side
   2,740.63x = 3,259,594.25
5. Step 5: Solve for x
   x = 3,259,594.25/2,740.63
6. Step 6: Final answer
   x = 1,189.36