Finding the Fourth Proportional to 3,915.30, 5,401.98 and 2,321.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.30 : 5,401.98 = 2,321.22 : x
2. Step 2: Convert to fraction form
   3,915.30/5,401.98 = 2,321.22/x
3. Step 3: Cross multiply
   3,915.30x = 5,401.98 × 2,321.22
4. Step 4: Simplify right side
   3,915.30x = 12,539,184.02
5. Step 5: Solve for x
   x = 12,539,184.02/3,915.30
6. Step 6: Final answer
   x = 3,202.61