Finding the Fourth Proportional to 2,091.28, 3,137.38 and 792.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.28 : 3,137.38 = 792.76 : x
2. Step 2: Convert to fraction form
   2,091.28/3,137.38 = 792.76/x
3. Step 3: Cross multiply
   2,091.28x = 3,137.38 × 792.76
4. Step 4: Simplify right side
   2,091.28x = 2,487,189.37
5. Step 5: Solve for x
   x = 2,487,189.37/2,091.28
6. Step 6: Final answer
   x = 1,189.31