Finding the Fourth Proportional to 2,610.55, 3,915.62 and 1,223.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.55 : 3,915.62 = 1,223.53 : x
2. Step 2: Convert to fraction form
   2,610.55/3,915.62 = 1,223.53/x
3. Step 3: Cross multiply
   2,610.55x = 3,915.62 × 1,223.53
4. Step 4: Simplify right side
   2,610.55x = 4,790,878.54
5. Step 5: Solve for x
   x = 4,790,878.54/2,610.55
6. Step 6: Final answer
   x = 1,835.20