Finding the Fourth Proportional to 5,287.89, 7,934.55 and 2,690.82

Step by Step Solution

1. Step 1: Write the proportion equation
   5,287.89 : 7,934.55 = 2,690.82 : x
2. Step 2: Convert to fraction form
   5,287.89/7,934.55 = 2,690.82/x
3. Step 3: Cross multiply
   5,287.89x = 7,934.55 × 2,690.82
4. Step 4: Simplify right side
   5,287.89x = 21,350,445.83
5. Step 5: Solve for x
   x = 21,350,445.83/5,287.89
6. Step 6: Final answer
   x = 4,037.61