Finding the Fourth Proportional to 2,664.72, 3,997.02 and 2,591.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,664.72 : 3,997.02 = 2,591.82 : x
2. Step 2: Convert to fraction form
   2,664.72/3,997.02 = 2,591.82/x
3. Step 3: Cross multiply
   2,664.72x = 3,997.02 × 2,591.82
4. Step 4: Simplify right side
   2,664.72x = 10,359,556.38
5. Step 5: Solve for x
   x = 10,359,556.38/2,664.72
6. Step 6: Final answer
   x = 3,887.67