Finding the Fourth Proportional to 2,607.34, 3,911.02 and 659.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.34 : 3,911.02 = 659.70 : x
2. Step 2: Convert to fraction form
   2,607.34/3,911.02 = 659.70/x
3. Step 3: Cross multiply
   2,607.34x = 3,911.02 × 659.70
4. Step 4: Simplify right side
   2,607.34x = 2,580,099.89
5. Step 5: Solve for x
   x = 2,580,099.89/2,607.34
6. Step 6: Final answer
   x = 989.55