Finding the Fourth Proportional to 2,610.69, 3,915.33 and 1,222.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.69 : 3,915.33 = 1,222.67 : x
2. Step 2: Convert to fraction form
   2,610.69/3,915.33 = 1,222.67/x
3. Step 3: Cross multiply
   2,610.69x = 3,915.33 × 1,222.67
4. Step 4: Simplify right side
   2,610.69x = 4,787,156.53
5. Step 5: Solve for x
   x = 4,787,156.53/2,610.69
6. Step 6: Final answer
   x = 1,833.67