Finding the Fourth Proportional to 2,607.47, 3,911.33 and 659.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.47 : 3,911.33 = 659.69 : x
2. Step 2: Convert to fraction form
   2,607.47/3,911.33 = 659.69/x
3. Step 3: Cross multiply
   2,607.47x = 3,911.33 × 659.69
4. Step 4: Simplify right side
   2,607.47x = 2,580,247.38
5. Step 5: Solve for x
   x = 2,580,247.38/2,607.47
6. Step 6: Final answer
   x = 989.56