Finding the Fourth Proportional to 2,641.31, 3,961.57 and 792.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.31 : 3,961.57 = 792.35 : x
2. Step 2: Convert to fraction form
   2,641.31/3,961.57 = 792.35/x
3. Step 3: Cross multiply
   2,641.31x = 3,961.57 × 792.35
4. Step 4: Simplify right side
   2,641.31x = 3,138,949.99
5. Step 5: Solve for x
   x = 3,138,949.99/2,641.31
6. Step 6: Final answer
   x = 1,188.41